CN102337377A - Molten steel wire feeding device and wire feeding method - Google Patents
Molten steel wire feeding device and wire feeding method Download PDFInfo
- Publication number
- CN102337377A CN102337377A CN2011102424902A CN201110242490A CN102337377A CN 102337377 A CN102337377 A CN 102337377A CN 2011102424902 A CN2011102424902 A CN 2011102424902A CN 201110242490 A CN201110242490 A CN 201110242490A CN 102337377 A CN102337377 A CN 102337377A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- wire conduit
- feeding device
- wire
- protective guard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a molten steel wire feeding device and a wire feeding method, which has the advantages that oxygen-free protection atmosphere can be ensured to be formed in a wire feeding region during wire feeding, so the secondary pollution of molten steel is prevented. The molten steel wire feeding device comprises a protecting cover, a wire guide pipe, a protecting gas supply pipe and an alloy wire, wherein the protecting cover is provided with an open bottom, the top of the protecting cover is provided with a first open hole and a second open hole, the wire guide pipe extends into the protecting cover from the outside through the first open hole, the protecting gas supply pipe extends into the protecting cover from the outside through the second open hole, and the alloy wire passes through the wire guide pipe and enters the protecting cover from the outside.
Description
Technical field
The present invention relates to molten steel Yarn feeding device and line feeding method, specifically, the present invention relates to a kind ofly form the anaerobic protective atmosphere in the line feeding zone can guarantee line feeding the time, thereby prevent the molten steel Yarn feeding device and the line feeding method of molten steel secondary pollution.
Background technology
Perhaps reconcile the alloying constituent of molten steel in order further to remove impurity, thereby obtain steel of different nature, after steel-making, need carry out external refining usually molten steel in the steel-making later stage.
Feeding wire machine is the outer purified necessaries of continuous casting furnace, and its effect is that various alloy wires such as bag core titanium wire, silicon-calcium wire, carbon line, sulphur line and aluminum steel are sent into molten steel inside fast, reaches the purpose of deoxidation of molten steel, inclusion modification and trimming.The principle of work of feeding wire machine is: alloy wire is sent between the feeding wire machine Wire Wheel compressed, when Wire Wheel rotates, rely on the frictional force traction alloy wire that produces with alloy wire to insert fast in the molten steel through the line feeding conduit, to reach the purpose of external refining.
The feeding wire machine of generally using is at present mainly used following manner.The one, directly alloy wire is sent into molten steel through the line feeding conduit through slag, this method is the main existing way of present domestic feeding wire machine line feeding.Yet, owing to lack necessary sfgd., cause in the hot environment of alloy wire above slag liquid level and slag liquid level oxidation serious, reduced the yield of alloy.And the top of the slag fluctuation of sending into the alloy wire position is serious, even makes molten steel exposed, is easy to cause the secondary oxidation of molten steel, causes inclusion rising in the molten steel, influences the quality of steel.The 2nd, through on ladle, setting up clad, thus line feeding under the seal protection state, but because sealing effectiveness is undesirable, fail to obtain to promote.The 3rd, only a few steel mill has adopted the line feeding mode that feeds argon shield property gas through gas tube in the line feeding zone; But owing to can't guarantee to stop the stable rare gas element zone of formation in the line feeding zone at argon gas; The oxidizing atmosphere in line feeding zone is still dense; Can't really realize the non-oxidizing atmosphere line feeding, its result of use is restricted, and fails at home to obtain to promote.
For this reason, need provide a kind of and form reliable anaerobic protective atmosphere in the line feeding zone can guarantee line feeding the time, thereby prevent the molten steel Yarn feeding device and the line feeding method of molten steel secondary pollution.
Summary of the invention
Each side of the present invention provides a kind of and has formed the anaerobic protective atmosphere in the line feeding zone can guarantee line feeding the time, thereby prevents the molten steel Yarn feeding device and the line feeding method of molten steel secondary pollution.
One side of the present invention provides a kind of molten steel Yarn feeding device, and said molten steel Yarn feeding device comprises: protective guard, have unlimited bottom, and the top of protective guard has first perforate and second perforate; Wire conduit extends to protective guard inside through first perforate from the outside; Protection gas supply pipe extends to protective guard inside through second perforate from the outside.
According to a further aspect in the invention, wire conduit comprises first wire conduit and second wire conduit, and first wire conduit and second wire conduit form sleeve structure, and win wire conduit and second wire conduit can be moved relative to each other.
According to a further aspect in the invention, said molten steel Yarn feeding device also comprises arrangement for adjusting height, and arrangement for adjusting height is controlled the relative movement of first wire conduit and second wire conduit, thus the height of control protective guard.
According to a further aspect in the invention, arrangement for adjusting height comprises from the group of being made up of lifting arm, hydraulicefficiency plant, gear, chain, select at least a.
According to a further aspect in the invention, the area at said molten steel Yarn feeding device top is less than the area of its bottom.
Another aspect of the present invention provides a kind of molten steel line feeding method, and this method may further comprise the steps: make the bottom of opening wide of the protective guard in the molten steel Yarn feeding device as claimed in claim 1 press close to the slag liquid level; In the inner protective belt of protective guard, feed protection gas through protection gas supply pipe; After the air in discharging the protective belt, alloy wire is inserted into slag liquid level below, continues simultaneously through protection gas supply pipe supply protection gas through wire conduit.
According to a further aspect in the invention, wire conduit comprises first wire conduit and second wire conduit, and first wire conduit and second wire conduit form sleeve structure, and win wire conduit and second wire conduit can be moved relative to each other.
According to a further aspect in the invention, said molten steel Yarn feeding device also comprises arrangement for adjusting height, and arrangement for adjusting height is controlled the relative movement of first wire conduit and second wire conduit, thus the height of control protective guard.
According to a further aspect in the invention, arrangement for adjusting height comprises from the group of being made up of lifting arm, hydraulicefficiency plant, gear, chain, select at least a.
According to a further aspect in the invention, the area at said molten steel Yarn feeding device top is less than the area of its bottom.
Description of drawings
Through the description of carrying out below in conjunction with accompanying drawing to embodiment, above-mentioned and/or other purposes of the present invention and advantage will become apparent, wherein:
Fig. 1 is an embodiment synoptic diagram according to molten steel Yarn feeding device of the present invention;
Fig. 2 is the synoptic diagram according to another embodiment of molten steel Yarn feeding device of the present invention.
Embodiment
Exemplary embodiment of the present invention is described with reference to the accompanying drawings.Though should be noted in the discussion above that the concrete shape of parts shown in the drawings, providing these accompanying drawings only is for the ease of description, rather than from restriction the object of the invention.The invention is not restricted to shown concrete shape of accompanying drawing and ratio.
Fig. 1 is an embodiment synoptic diagram according to molten steel Yarn feeding device of the present invention.With reference to Fig. 1, molten steel Yarn feeding device 100 comprises: protective guard 110, have unlimited bottom, and the top of protective guard has first perforate 120 and second perforate 130; Wire conduit 140 extends to protective guard 110 inside through first perforate 120 from the outside; Protection gas supply pipe 150 extends to protective guard 110 inside through second perforate 130 from the outside; Alloy wire 160 passes wire conduit 140 and enters into protective guard 110 inside from the outside.
According to one embodiment of present invention, the profile of protective guard 110 is for being inverted the hollow funnel of pentahedron shape (that is, three terrace with edge shapes), and its top surface is a trilateral, and three side surfaces are trapezoidal, and the bottom surface is leg-of-mutton opening.
First perforate 120 and second perforate 130 are separately positioned on the top of protective guard 110 (that is top surface).Wire conduit 140 extends to protective guard 110 inside through first perforate 120 from the outside, and protection gas supply pipe 150 passes second perforate 130 and extends to protective guard 110 inside from the outside.
Fig. 2 is the synoptic diagram according to another embodiment of molten steel Yarn feeding device of the present invention, will describe molten steel Yarn feeding device 200 according to another embodiment of the present invention with reference to Fig. 2 below.
Under the actual production conditions, the slag liquid level 20 of steel mill can be fluctuated owing to the difference of tap, when the slag liquid level is low, can cause protective guard can't press close to the slag liquid level, and protective atmosphere can be affected.In order to address the above problem; With reference to Fig. 2; Wire conduit 140 can comprise that first wire conduit 141 and second wire conduit, 142, the first wire conduits 141 link to each other with the feeding wire machine (not shown), and second wire conduit 142 is connected to protective guard 110; And form sleeve structure between first wire conduit 141 and second wire conduit 142, thereby first wire conduit 141 and second wire conduit 142 can move relative to each other.Wherein, first wire conduit 141 can be sleeved in second wire conduit 142, and correspondingly, second wire conduit 142 can be sleeved in first wire conduit 141.
According to one embodiment of present invention, first wire conduit 141 is communicated with feeding wire machine, makes alloy wire 160 can pass first wire conduit 141.Second wire conduit 142 is connected with protective guard 110, makes protective guard 110 to move along with moving of second wire conduit 142.
Utilize said structure, can correspondingly regulate the height of protective guard 110 through the relative movement of first wire conduit 141 and second wire conduit 142, thereby guarantee that protective guard 110 can remain near slag liquid level 20.Specifically, when slag liquid level 20 descended, protective guard 110 was along with second wire conduit moves downward, thereby can keep protective guard 110 near slag liquid level 20.When the slag liquid level rose, protective guard 110 can move upward along with second wire conduit, thereby can avoid protective guard 110 to be immersed in the molten steel and pollute molten steel.
According to one embodiment of present invention, molten steel Yarn feeding device 200 also comprises arrangement for adjusting height 170, the relative movement of arrangement for adjusting height 170 control first wire conduits 141 and second wire conduit 142, thereby the height of control protective guard 110.It is at least a that arrangement for adjusting height 170 includes but not limited to from the group of being made up of lifting arm, hydraulicefficiency plant, gear, chain, to select.Arrangement for adjusting height 170 can be connected to second wire conduit 142, thereby through the rising that drives second wire conduit 142, rising, the decline that decline realizes protective guard 110.According to one embodiment of present invention, arrangement for adjusting height 170 can also be directly connected to protective guard 110, thereby directly controls the rising of protective guard 110, the relative movement that first wire conduit 141 and second wire conduit 142 are controlled in decline indirectly.
Protection gas supply pipe 150 passes second perforate 130 and extends to protective guard 110 inside from the outside.Protection gas supply pipe 150 is used for protection gas is fed to the protective belt 10 of protective guard 110 inside, thereby in protective belt 10, forms nonoxidizing atmosphere.Therefore, can prevent alloy wire 160 near slag liquid level 20 time because high temperature and oxidizing atmosphere and oxidized inefficacy, thereby and can prevent to make the molten steel exposure cause secondary oxidation owing to the stirring of alloy wire.
Protection gas can be the various non-oxidizing gas that do not react with molten steel or alloy wire, and preferably, protection gas can be various rare gas elementes, nitrogen etc.According to one embodiment of present invention, protection gas can be argon gas.
To describe molten steel line feeding method according to an embodiment of the invention below in detail.
Molten steel line feeding method according to an embodiment of the invention may further comprise the steps: make the bottom of opening wide of the protective guard 110 in the molten steel Yarn feeding device 100 according to an embodiment of the invention press close to slag liquid level 20; In the inner protective belt 10 of protective guard, feed protection gas through protection gas supply pipe 150; After the air in discharging protective belt 10, alloy wire 160 is inserted into slag liquid level 20 belows, continues simultaneously through protection gas supply pipe 150 supply protection gas through wire conduit 140.
In line feeding method of the present invention, make protection gas replace the air in the protective belt 10 gradually through in protective belt 10, feeding protection gas.Those skilled in the art can utilize the whole bag of tricks well known in the art to judge the air emptying whether in the protective belt 10.For example, can wait to judge whether also there is oxygen in the protective belt 10, be used as judging the air foundation of emptying whether in the protective belt 10 with this through spectroscopic analysis, fire test.According to a further aspect in the invention, those skilled in the art also can judge under the certain protection gas flow rate through Theoretical Calculation, simple experiment or knowhow needs the time how long can make the whole emptyings of air in the protective belt 10.These determination methods are known to those skilled in the art, therefore no longer are repeated in this description at this.
Through above method; Can before alloy wire 160 entering protective belts 10, in protective belt 10, form nonoxidizing atmosphere; Thereby can prevent alloy wire 160 near slag liquid level 20 time because high temperature and oxidizing atmosphere and oxidized inefficacy, thereby and can prevent to make the molten steel exposure cause secondary oxidation owing to the stirring of alloy wire.
The present invention is simple in structure, and convenient in application is owing to can keep the atmosphere of non-oxidation all the time in the protective guard; Air can't get into; So that alloy wire is penetrated in the process is not oxidized, and because the existence of protective guard, can alloy wire be penetrated in the scope that caused liquid fluctuating is limited in the protective belt; Thereby the liquid fluctuating that alloy wire is penetrated cause also will reduce, and exposed molten steel also can be protected cover and protective atmosphere protection and not by secondary oxidation.
Though described the present invention with reference to embodiment; But it should be understood by one skilled in the art that; Under the situation that does not break away from the spirit and scope of the present invention, can make amendment and change these embodiment, scope of the present invention is limited claims and equivalent thereof.
Claims (10)
1. molten steel Yarn feeding device, said molten steel Yarn feeding device comprises:
Protective guard has unlimited bottom, and the top of protective guard has first perforate and second perforate;
Wire conduit extends to protective guard inside through first perforate from the outside;
Protection gas supply pipe extends to protective guard inside through second perforate from the outside.
2. molten steel Yarn feeding device as claimed in claim 1, wherein, wire conduit comprises first wire conduit and second wire conduit, first wire conduit and second wire conduit form sleeve structure, and win wire conduit and second wire conduit can be moved relative to each other.
3. molten steel Yarn feeding device as claimed in claim 2, said molten steel Yarn feeding device also comprises arrangement for adjusting height, arrangement for adjusting height is controlled the relative movement of first wire conduit and second wire conduit, thus the height of control protective guard.
4. molten steel Yarn feeding device as claimed in claim 3, wherein, arrangement for adjusting height comprises from the group of being made up of lifting arm, hydraulicefficiency plant, gear, chain, select at least a.
5. molten steel Yarn feeding device as claimed in claim 1, wherein, the area at said molten steel Yarn feeding device top is less than the area of its bottom.
6. molten steel line feeding method, this method may further comprise the steps:
Make the bottom of opening wide of the protective guard in the molten steel Yarn feeding device as claimed in claim 1 press close to the slag liquid level;
In the inner protective belt of protective guard, feed protection gas through protection gas supply pipe;
After the air in discharging the protective belt, alloy wire is inserted into slag liquid level below, continues simultaneously through protection gas supply pipe supply protection gas through wire conduit.
7. method as claimed in claim 6, wherein, wire conduit comprises first wire conduit and second wire conduit, first wire conduit and second wire conduit form sleeve structure, and win wire conduit and second wire conduit can be moved relative to each other.
8. method as claimed in claim 7, said molten steel Yarn feeding device also comprises arrangement for adjusting height, arrangement for adjusting height is controlled the relative movement of first wire conduit and second wire conduit, thus the height of control protective guard.
9. method as claimed in claim 8, wherein, arrangement for adjusting height comprises from the group of being made up of lifting arm, hydraulicefficiency plant, gear, chain, select at least a.
10. method as claimed in claim 6, wherein, the area at said molten steel Yarn feeding device top is less than the area of its bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102424902A CN102337377A (en) | 2011-08-23 | 2011-08-23 | Molten steel wire feeding device and wire feeding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102424902A CN102337377A (en) | 2011-08-23 | 2011-08-23 | Molten steel wire feeding device and wire feeding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102337377A true CN102337377A (en) | 2012-02-01 |
Family
ID=45513326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102424902A Pending CN102337377A (en) | 2011-08-23 | 2011-08-23 | Molten steel wire feeding device and wire feeding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102337377A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086304A (en) * | 2016-08-02 | 2016-11-09 | 芜湖新兴铸管有限责任公司 | The threads feeding apparatus of RH refining furnace and hello silk method |
| CN106811575A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Device for improving yield of aluminum after converter and using method |
| CN111394540A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and manufacturing method thereof |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | A Ladle Feeding Device Protected by Double Air Curtain |
| CN115161431A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | A Ladle Feeding Process with Double Air Curtain Protection |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094666A (en) * | 1977-05-24 | 1978-06-13 | Metal Research Corporation | Method for refining molten iron and steels |
| CN1294199A (en) * | 1999-11-02 | 2001-05-09 | 北京科技大学 | Technology for desulfurizing molten steel in enclosed ladle by spraying powder |
| CN1394966A (en) * | 2001-07-09 | 2003-02-05 | 济南钢铁股份有限公司 | Gas protection process for feeding alloy wire into molten stel and its equipment |
| CN2773093Y (en) * | 2005-02-07 | 2006-04-19 | 宝山钢铁股份有限公司 | Immersion cover of continuous iron-liquid pretreatment |
| CN1851003A (en) * | 2005-04-22 | 2006-10-25 | 盛富春 | High-absorbility magnesium-feeding line desulfurizing method and its special apparatus |
| CN201241169Y (en) * | 2008-08-14 | 2009-05-20 | 唐山钢铁股份有限公司 | Elevation type wire feeding apparatus |
| CN201660662U (en) * | 2010-02-08 | 2010-12-01 | 鞍钢股份有限公司 | A CAS-OB device for pollution-free deoxidation |
| CN101962701A (en) * | 2010-08-19 | 2011-02-02 | 北京科技大学 | LT-CAS (Control Automatic System) double-station vacuum refining device and process method thereof |
| CN202214380U (en) * | 2011-08-23 | 2012-05-09 | 莱芜钢铁集团有限公司 | Molten steel wire feeder |
-
2011
- 2011-08-23 CN CN2011102424902A patent/CN102337377A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094666A (en) * | 1977-05-24 | 1978-06-13 | Metal Research Corporation | Method for refining molten iron and steels |
| CN1294199A (en) * | 1999-11-02 | 2001-05-09 | 北京科技大学 | Technology for desulfurizing molten steel in enclosed ladle by spraying powder |
| CN1394966A (en) * | 2001-07-09 | 2003-02-05 | 济南钢铁股份有限公司 | Gas protection process for feeding alloy wire into molten stel and its equipment |
| CN2773093Y (en) * | 2005-02-07 | 2006-04-19 | 宝山钢铁股份有限公司 | Immersion cover of continuous iron-liquid pretreatment |
| CN1851003A (en) * | 2005-04-22 | 2006-10-25 | 盛富春 | High-absorbility magnesium-feeding line desulfurizing method and its special apparatus |
| CN201241169Y (en) * | 2008-08-14 | 2009-05-20 | 唐山钢铁股份有限公司 | Elevation type wire feeding apparatus |
| CN201660662U (en) * | 2010-02-08 | 2010-12-01 | 鞍钢股份有限公司 | A CAS-OB device for pollution-free deoxidation |
| CN101962701A (en) * | 2010-08-19 | 2011-02-02 | 北京科技大学 | LT-CAS (Control Automatic System) double-station vacuum refining device and process method thereof |
| CN202214380U (en) * | 2011-08-23 | 2012-05-09 | 莱芜钢铁集团有限公司 | Molten steel wire feeder |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811575A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Device for improving yield of aluminum after converter and using method |
| CN106086304A (en) * | 2016-08-02 | 2016-11-09 | 芜湖新兴铸管有限责任公司 | The threads feeding apparatus of RH refining furnace and hello silk method |
| CN106086304B (en) * | 2016-08-02 | 2018-11-06 | 芜湖新兴铸管有限责任公司 | The threads feeding apparatus of RH refining furnaces and hello silk method |
| CN111394540A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and manufacturing method thereof |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | A Ladle Feeding Device Protected by Double Air Curtain |
| CN115161431A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | A Ladle Feeding Process with Double Air Curtain Protection |
| CN115161433B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | A double-layer air curtain protected ladle wire feeding device |
| CN115161431B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | Ladle wire feeding process with double-layer air curtain protection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102212749B (en) | Method for producing steel for high-efficiency alloy welding wires through continuous billet casting | |
| CN100465291C (en) | Production tech. of low carbon low silicon aluminium killed steel | |
| CN101580912B (en) | Low carbon high sulfur free-cutting steel production process | |
| CN102337377A (en) | Molten steel wire feeding device and wire feeding method | |
| CN112620598A (en) | Continuous casting crystallizer casting powder special for sorbite stainless steel and application thereof | |
| CN202297669U (en) | Wire feeder guiding device for inhibiting alloy oxidation and preventing nitriding | |
| CN104611502A (en) | Aluminum-containing and sulfur-containing series gear steel smelting process | |
| CN102851447B (en) | Out-of-furnace refining production method of steel for gas-shielded arc welding of carbon steel for solid wire | |
| CN101643882A (en) | Clean steel smelting method of anti-S steel oil well pipe | |
| CN202214380U (en) | Molten steel wire feeder | |
| CN102827997A (en) | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof | |
| CN101550469A (en) | Operating method for using low- or mediate-silico-manganese ferroalloy in process of temperature-adjusting deoxidation alloying for steel-making | |
| CN110616293B (en) | Method for adding rare earth into molten steel | |
| WO2011007261A3 (en) | Method for smelting, reducing, alloying and treating steel | |
| EP2889385B1 (en) | Straight barrel type vacuum refining device and method for use the same | |
| CN101457273B (en) | A production method of billet continuous casting high-titanium alloy welding wire steel | |
| CN107974528B (en) | Method for reducing nitrogen content of molten steel at converter end point | |
| JP2010070815A (en) | Ladle for refining molten steel and method for refining molten steel | |
| Ping | Oxide inclusions in ferromanganese and its influence on the quality of clean steels | |
| CN111996328A (en) | Molten iron desulphurization method for smelting reduction furnace | |
| CN102925631B (en) | Novel vacuum circulating degassing furnace and processing method thereof | |
| CN106498116B (en) | A kind of production technology of circle chain of mine steel | |
| JP2010116610A (en) | Method for manufacturing low-sulfur thick steel plate excellent in haz toughness at the time of inputting large amount of heat | |
| EP1228251A1 (en) | Method and device for melting down finely particulate material containing metal, such as sponge iron | |
| CN115747403A (en) | Smelting method of high-cleanliness seamless pipe steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120201 |