CN106319538A - Room-temperature metal surface degreaser and preparing method thereof - Google Patents
Room-temperature metal surface degreaser and preparing method thereof Download PDFInfo
- Publication number
- CN106319538A CN106319538A CN201610871000.8A CN201610871000A CN106319538A CN 106319538 A CN106319538 A CN 106319538A CN 201610871000 A CN201610871000 A CN 201610871000A CN 106319538 A CN106319538 A CN 106319538A
- Authority
- CN
- China
- Prior art keywords
- weight portion
- weight
- acid
- metal surface
- degreaser
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a room-temperature metal surface degreaser and a preparing method thereof. The degreaser comprises 40-100 parts by weight of alkylphenol ethoxylates, 3-15 parts by weight of trisodium phosphate, 100-300 parts by weight of sodium molybdate, 5-18 parts by weight of Ninol, 6-40 parts by weight of organic acid, 2-10 parts by weight of a metal chelator, 3-12 parts by weight of tryptophan, 1-8 parts by weight of sodium alga acid and 100-600 parts by weight of water. The metal surface degreaser provided by the invention has a great degreasing effect at a room temperature.
Description
Technical field
The present invention relates to degreaser technical field, be specifically related to a kind of normal temperature metal surface degreasing agent and preparation method thereof.
Background technology
Degreaser is with the complex mixture of the organic of water-based with inorganic chemical composition, is to utilize " emulsifying " " saponification "
Principle and the infant industry degreaser developed.At intermetallic composite coating, food, weaving, traffic, boats and ships, building, electrical equipment, medicine, chemical industry
All have been widely used Deng industrial circle, although the surface matrix of cleaning is not quite similar, but it is consistent for cleaning purpose, is all extensive
The cleanliness factor of multiple stromal surface and the integrity of holding stromal surface.
Chinese patent CN 102108321 A discloses a kind of degreasing agent for metal, and this degreaser includes anion surface active
Agent, nonionic surfactant, solubilizing agent and corrosion inhibiter, wherein said corrosion inhibiter includes the monocarboxylic acid that weight ratio is 10-1: 1
And dicarboxylic acids.Present invention also offers to be immersed in degreaser metal material and carry out ultrasonic oil removing, the time is 1-3min, removes
Oil preparation temperature is 50-80 DEG C, and described degreaser is the degreaser described in claim 1.The degreaser of this patent can be extremely short
Time in the effective greasy dirt removing metal surface, metal is not had corrosivity, the formula of degreaser is simple simultaneously, cost
Low, stable performance.
Chinese patent CN1730729A discloses a kind of biological oil removing being applied to metal-processing industry pre-treatment oil removing defat
Agent and the method processing metal surface greasy dirt thereof.The present invention is directed to the present situation of existing oily waste treatment, creatively propose oil removing
The thought that the technique separate with decomposing greasy dirt the two is studied as a technique.The engineers of the present invention is through long
The arduous tackling key problem of phase, the most successfully have developed containing surfactant and addicted to oil microorganism fungus kind new bio degreaser.
It is not only able to peel off greasy dirt from metal surface containing the biological degreasing agent addicted to oil microorganism, and simultaneously can also be by greasy dirt
Decompose, it is achieved thereby that the purpose that oil removing is processed as a technique with decomposition greasy dirt.The biological degreasing agent of this patent should
For the oily waste treatment of heavy polluted industry, with existing electrochemical deoiling agent, solvent-borne type degreaser are compared, have energy-conservation, lower consumption, subtract
The remarkable advantages such as dirt, environmental protection.
Summary of the invention
It is an object of the invention to provide a kind of normal temperature metal surface degreasing agent and preparation method thereof, the gold that the present invention provides
Metal surface degreaser has good deoiling effect at normal temperatures.
For achieving the above object, the present invention provides a kind of normal temperature metal surface degreasing agent, and described degreaser includes 40-100
Weight portion alkyl phenol polyoxy ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, Buddhist nun's sodium of 5-18 weight portion
That, the organic acid of 6-40 weight portion, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sea of 1-8 weight portion
Sodium alginate and the water of 100-600 weight portion.
Preferably, described degreaser include 50-80 weight portion alkyl phenol polyoxy ether, 5-10 parts by weight of phosphoric acid trisodium,
200-250 weight portion sodium molybdate, the organic acid of Ni Naer, 12-30 weight portion of 6-12 weight portion, the metal chelating of 5-8 weight portion
Mixture, the tryptophan of 5-10 weight portion, the sodium alginate of 2-6 weight portion and the water of 200-500 weight portion.
Preferably, described organic acid is citric acid, oxalic acid or acetic acid.
Preferably, described metal-chelator is ethylenediaminetetraacetic acid, aminotriacetic acid, diethylene-triamine pentaacetic acid or three
Ethanolamine.
Preferably, described degreaser also includes sodium gluconate and the normal heptane of 10-15 weight portion of 30-50 weight portion.
The present invention also provides for the preparation method of a kind of normal temperature metal surface degreasing agent, by 40-100 weight portion alkyl phenol polyoxy
Ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, the having of Ni Naer, 6-40 weight portion of 5-18 weight portion
Machine acid, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sodium alginate of 1-8 weight portion and 100-600 weight
The water mixing of amount part, obtains described metal surface degreaser.
Preferably, described degreaser include 50-80 weight portion alkyl phenol polyoxy ether, 5-10 parts by weight of phosphoric acid trisodium,
200-250 weight portion sodium molybdate, the organic acid of Ni Naer, 12-30 weight portion of 6-12 weight portion, the metal chelating of 5-8 weight portion
Mixture, the tryptophan of 5-10 weight portion, the sodium alginate of 2-6 weight portion and the water of 200-500 weight portion.
Preferably, described organic acid is citric acid, oxalic acid or acetic acid.
Preferably, described metal-chelator is ethylenediaminetetraacetic acid, aminotriacetic acid, diethylene-triamine pentaacetic acid or three
Ethanolamine.
Preferably, described degreaser also includes sodium gluconate and the normal heptane of 10-15 weight portion of 30-50 weight portion.
Present invention have the advantage that
The metal surface degreaser of the present invention oil removing time under the room temperature of 5-25 DEG C is short, and little to metal erosion,
Do not produce rust staining, and bubbles volume is few.
Detailed description of the invention
Detailed description below is merely to illustrate the present invention, but the present invention is not therefore subject to any restriction.
It should be noted that the room temperature of the present invention refers to 5-25 DEG C.
The present invention provides a kind of normal temperature metal surface degreasing agent, and described degreaser includes 40-100 weight portion alkyl phenol polyoxy
Ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, the having of Ni Naer, 6-40 weight portion of 5-18 weight portion
Machine acid, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sodium alginate of 1-8 weight portion and 100-600 weight
The water of amount part;Preferably, described degreaser include 50-80 weight portion alkyl phenol polyoxy ether, 5-10 parts by weight of phosphoric acid trisodium,
200-250 weight portion sodium molybdate, the organic acid of Ni Naer, 12-30 weight portion of 6-12 weight portion, the metal chelating of 5-8 weight portion
Mixture, the tryptophan of 5-10 weight portion, the sodium alginate of 2-6 weight portion and the water of 200-500 weight portion.
The present invention also provides for the preparation method of a kind of normal temperature metal surface degreasing agent, by 40-100 weight portion alkyl phenol polyoxy
Ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, the having of Ni Naer, 6-40 weight portion of 5-18 weight portion
Machine acid, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sodium alginate of 1-8 weight portion and 100-600 weight
The water mixing of amount part, obtains described metal surface degreaser;Preferably, described degreaser includes that 50-80 weight portion alkyl phenol gathers
Oxygen ether, 5-10 parts by weight of phosphoric acid trisodium, 200-250 weight portion sodium molybdate, Ni Naer, 12-30 weight portion of 6-12 weight portion
Organic acid, the metal-chelator of 5-8 weight portion, the tryptophan of 5-10 weight portion, the sodium alginate of 2-6 weight portion and 200-
The water of 500 weight portions.
Organic acid refers to that some have the organic compound of acidity.Modal organic acid includes citric acid, oxalic acid or second
Acid etc..
Metal-chelator (metal chelating agent) can be by the strong combination of chelator molecule with metal ion
Effect, inside metal ion inclusion to chelating agen, become stable, the compound that molecular weight is bigger, thus stop metal from
Son works, and described metal-chelator can be ethylenediaminetetraacetic acid, aminotriacetic acid, diethylene-triamine pentaacetic acid or three second
Hydramine.
A kind of detailed description of the invention, described degreaser can also include sodium gluconate and the 10-15 weight of 30-50 weight portion
The normal heptane of amount part.
Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Embodiment 1
By 60 weight portion alkyl phenol polyoxy ether, 8 parts by weight of phosphoric acid trisodiums, 200 weight portion sodium molybdate, the Buddhist nun of 16 weight portions
Sodium that, the citric acid of 20 weight portions, the aminotriacetic acid of 5 weight portions, the tryptophan of 7 weight portions, the sodium alginate of 4 weight portions and
The water mixing of 300 weight portions, obtains metal surface degreaser 1.
Embodiment 2
By 60 weight portion alkyl phenol polyoxy ether, 12 parts by weight of phosphoric acid trisodiums, 200 weight portion sodium molybdate, 15 weight portions
Ni Naer, the oxalic acid of 20 weight portions, the triethanolamine of 7 weight portions, the tryptophan of 8 weight portions, the sodium alginate of 4 weight portions and
The water mixing of 200 weight portions, obtains metal surface degreaser 2.
Embodiment 3
By 200 weight portion alkyl phenol polyoxy ether, 12 parts by weight of phosphoric acid trisodiums, 100 weight portion sodium molybdate, 5 weight portions
Ni Naer, the acetic acid of 6 weight portions, the ethylenediaminetetraacetic acid of 2 weight portions, the tryptophan of 3 weight portions, the gluconic acid of 30 weight portions
The water mixing of sodium, the normal heptane of 12 weight portions, the sodium alginate of 5 weight portions and 100 weight portions, obtains metal surface degreaser 3.
Comparative example 1
Comparative example 1 is to be added without alkyl phenol polyoxy ether with the difference of embodiment 1, obtains metal surface degreaser D1.
Comparative example 2
Comparative example 2 is to be added without sodium alginate with the difference of embodiment 1, obtains metal surface degreaser D2.
Comparative example 3
Comparative example 3 is to be added without tryptophan with the difference of embodiment 1, obtains metal surface degreaser D3.
Testing example
Enter machine oil and butter mixture then take out by No. 45 steel that specification is 100mm × 50mm × 0.5mm and put into
In degreaser prepared by embodiment and comparative example, passing in and out oil removing at 5-25 DEG C, with latten(-tin) surface-brightening as standard, calculating removes
The oil time, concrete data are shown in Table 1.
The measurement of the rate of corrosion of degreaser uses weight-loss method, and (GB10124-88, metal material laboratory homogeneous corrosion is soaked entirely
Test method): at 25 DEG C, test piece is weighed as before use A0, degreasing fluid soaks 2h, soak after terminating, from solution
Take out test piece, rinse with tap water, then dry up after Acetone rinse, in exsiccator, after constant weight, be weighed as A, the calculating of rate of corrosion
Formula: X=A0-A/A0 × 100%, X is weight-loss ratio (%), and concrete data are shown in Table 2.
Degreaser is dripped on the surface of No. 45 steel, places 1 hour at 25 DEG C, observe and formed with or without rust staining, specifically count
According to being shown in Table 2.
According to the foaming characteristic of GB/T7462-94, Ross-Miles instrument test surfaces activating agent, surfactant concentration to be measured
Being 0.05%, the foam volume after record 5min, concrete data are shown in Table 2, and foam is the fewest, and to represent performance the best, to washing interference more
Little.
Table 1
Metal surface degreaser | 1 | 2 | 3 | D1 | D2 | D3 |
5 DEG C of oil removing times, minute | 6 | 8 | 7 | 26 | 17 | 29 |
10 DEG C of oil removing times, minute | 5 | 8 | 5 | 18 | 15 | 24 |
20 DEG C of oil removing times, minute | 4 | 7 | 3 | 14 | 10 | 20 |
25 DEG C of oil removing times, minute | 4 | 6 | 3 | 13 | 9 | 17 |
Table 2
Metal surface degreaser | 1 | 2 | 3 | D1 | D2 | D3 |
Weight-loss ratio, % | 0.2 | 0.4 | 0.5 | 0.7 | 0.9 | 1.1 |
With or without rust staining | Nothing | Nothing | Nothing | Nothing | Nothing | Have |
Bubbles volume, milliliter | 35 | 40 | 21 | 60 | 71 | 55 |
As it can be seen from table 1 the metal surface degreaser of the present invention the most not only oil removing time is short, to metal erosion
Little, and bubbles volume is few.
Although, the present invention is described in detail to have used general explanation and specific embodiment, but at this
On the basis of invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (10)
1. a normal temperature metal surface degreasing agent, it is characterised in that described degreaser includes 40-100 weight portion alkyl phenol polyoxy
Ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, the having of Ni Naer, 6-40 weight portion of 5-18 weight portion
Machine acid, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sodium alginate of 1-8 weight portion and 100-600 weight
The water of amount part.
Normal temperature metal surface degreasing agent the most according to claim 1, it is characterised in that described degreaser includes 50-80 weight
Amount part alkyl phenol polyoxy ether, 5-10 parts by weight of phosphoric acid trisodium, 200-250 weight portion sodium molybdate, the Ni Naer of 6-12 weight portion,
The organic acid of 12-30 weight portion, the metal-chelator of 5-8 weight portion, the tryptophan of 5-10 weight portion, the Sargassum of 2-6 weight portion
Acid sodium and the water of 200-500 weight portion.
Normal temperature metal surface degreasing agent the most according to claim 1, it is characterised in that described organic acid is citric acid, grass
Acid or acetic acid.
Normal temperature metal surface degreasing agent the most according to claim 1, it is characterised in that described metal-chelator is ethylenediamine
Tetraacethyl, aminotriacetic acid, diethylene-triamine pentaacetic acid or triethanolamine.
Normal temperature metal surface degreasing agent the most according to claim 1, it is characterised in that described degreaser also includes 30-50
The sodium gluconate of weight portion and the normal heptane of 10-15 weight portion.
6. the preparation method of a normal temperature metal surface degreasing agent, it is characterised in that by 40-100 weight portion alkyl phenol polyoxy second
Ether, 3-15 parts by weight of phosphoric acid trisodium, 100-300 weight portion sodium molybdate, Ni Naer, 6-40 weight portion organic of 5-18 weight portion
Acid, the metal-chelator of 2-10 weight portion, the tryptophan of 3-12 weight portion, the sodium alginate of 1-8 weight portion and 100-600 weight
The water mixing of part, obtains described metal surface degreaser.
The preparation method of normal temperature metal surface degreasing agent the most according to claim 6, it is characterised in that described degreaser bag
Include 50-80 weight portion alkyl phenol polyoxy ether, 5-10 parts by weight of phosphoric acid trisodium, 200-250 weight portion sodium molybdate, 6-12 weight portion
The organic acid of Ni Naer, 12-30 weight portion, the metal-chelator of 5-8 weight portion, the tryptophan of 5-10 weight portion, 2-6 weight
The sodium alginate of part and the water of 200-500 weight portion.
The preparation method of normal temperature metal surface degreasing agent the most according to claim 6, it is characterised in that described organic acid is
Citric acid, oxalic acid or acetic acid.
The preparation method of normal temperature metal surface degreasing agent the most according to claim 6, it is characterised in that described metal-chelating
Agent is ethylenediaminetetraacetic acid, aminotriacetic acid, diethylene-triamine pentaacetic acid or triethanolamine.
The preparation method of normal temperature metal surface degreasing agent the most according to claim 6, it is characterised in that described degreaser
Also include sodium gluconate and the normal heptane of 10-15 weight portion of 30-50 weight portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610871000.8A CN106319538A (en) | 2016-09-29 | 2016-09-29 | Room-temperature metal surface degreaser and preparing method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610871000.8A CN106319538A (en) | 2016-09-29 | 2016-09-29 | Room-temperature metal surface degreaser and preparing method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106319538A true CN106319538A (en) | 2017-01-11 |
Family
ID=57821242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610871000.8A Pending CN106319538A (en) | 2016-09-29 | 2016-09-29 | Room-temperature metal surface degreaser and preparing method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106319538A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106967526A (en) * | 2017-03-29 | 2017-07-21 | 希玛石油制品(镇江)有限公司 | A kind of degreasing cleaning agent and preparation method thereof |
CN108315742A (en) * | 2017-12-11 | 2018-07-24 | 安徽宝辰机电设备科技有限公司 | A kind of environment-friendly metal rust removing solution |
CN108866596A (en) * | 2017-05-12 | 2018-11-23 | 昆山汉鼎精密金属有限公司 | It removes differential arc oxidation film layer medicament, remove micro-arc oxidation films layer method |
CN113122862A (en) * | 2019-12-31 | 2021-07-16 | 天津绿展环保科技有限公司 | Oil-removing cleaning agent for hazardous waste packaging barrel |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1082629A (en) * | 1993-05-07 | 1994-02-23 | 李毅 | The production method of acid washing aditive materials |
CN102358875A (en) * | 2011-09-29 | 2012-02-22 | 广东环凯微生物科技有限公司 | Novel acidic detergent for container of food industry |
JP2016148084A (en) * | 2015-02-12 | 2016-08-18 | 第一工業製薬株式会社 | Detergent composition for aluminum-based metal |
-
2016
- 2016-09-29 CN CN201610871000.8A patent/CN106319538A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1082629A (en) * | 1993-05-07 | 1994-02-23 | 李毅 | The production method of acid washing aditive materials |
CN102358875A (en) * | 2011-09-29 | 2012-02-22 | 广东环凯微生物科技有限公司 | Novel acidic detergent for container of food industry |
JP2016148084A (en) * | 2015-02-12 | 2016-08-18 | 第一工業製薬株式会社 | Detergent composition for aluminum-based metal |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106967526A (en) * | 2017-03-29 | 2017-07-21 | 希玛石油制品(镇江)有限公司 | A kind of degreasing cleaning agent and preparation method thereof |
CN108866596A (en) * | 2017-05-12 | 2018-11-23 | 昆山汉鼎精密金属有限公司 | It removes differential arc oxidation film layer medicament, remove micro-arc oxidation films layer method |
CN108315742A (en) * | 2017-12-11 | 2018-07-24 | 安徽宝辰机电设备科技有限公司 | A kind of environment-friendly metal rust removing solution |
CN113122862A (en) * | 2019-12-31 | 2021-07-16 | 天津绿展环保科技有限公司 | Oil-removing cleaning agent for hazardous waste packaging barrel |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101463302A (en) | Aqueous degreasing agent for stainless steel tube | |
CN106319538A (en) | Room-temperature metal surface degreaser and preparing method thereof | |
CN103642612B (en) | A kind of aircraft pipeline clean-out system and preparation method | |
CN109136940A (en) | Low bubble cleaning agent of a kind of environment-friendly type high performance ferrous metal antirust and preparation method thereof | |
CN105386066B (en) | A kind of carbon steel pickling liquid and its application | |
CN108085693A (en) | Rust cleaning antirusting agent | |
CN104313622A (en) | Normal-temperature water-based non-phosphorus rust-proof cleaning agent for heavy oil | |
AU2017200653B2 (en) | Aqueous acid cleaning, corrosion and stain inhibiting compositions in the vapor phase comprising a blend of nitric and sulfuric acid | |
CN108070872A (en) | A kind of Phosphorus-Free Water-Based Cleaning Agent for Metals | |
CN111926339A (en) | Chemical stainless steel cleaning agent and preparation method thereof | |
CN102400162B (en) | Cleaning agent for stainless steel cold-rolling piece and preparation method thereof | |
CN110158107A (en) | A kind of Wax removal water and its preparation process for medal polish part | |
CN103774165A (en) | High-efficiency water-based die-casting aluminum alloy degreasing agent | |
CN101787536B (en) | Normal temperature hydrochloric acid pickling rust removing additive | |
CN105297057A (en) | Hydrocarbon oil removal rust removal cleaning agent | |
JP7214869B2 (en) | Acid cleaning composition for enhanced stain removal | |
CN106400034A (en) | Degreaser for surface of brass and preparation method thereof | |
CN107653085A (en) | A kind of scale remover | |
CN108754507A (en) | A kind of ultrasonic cleaning agent and preparation method and application method | |
CN103849869B (en) | A kind of bicycle use general carbon steel surface treatment liquid and preparation method thereof | |
AU2017202165B2 (en) | Acid cleaning and corrosion inhibiting compositions comprising a blend of nitric and sulfuric acid | |
CN108315744B (en) | A kind of degreasing and rust removing agent and its preparation method and application | |
CN111690942A (en) | Phosphorus-free degreasing agent and preparation method thereof | |
CN101565830A (en) | Rust-removing oil-removing wax-removing additive and preparation method thereof | |
CN106191880B (en) | Cleaning metal surface scale remover |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
|
RJ01 | Rejection of invention patent application after publication |