WO2005055387A1 - Schaltungsanordnung und verfahren zum steuern eines induktiven verbrauchers - Google Patents
Schaltungsanordnung und verfahren zum steuern eines induktiven verbrauchers Download PDFInfo
- Publication number
- WO2005055387A1 WO2005055387A1 PCT/EP2004/053147 EP2004053147W WO2005055387A1 WO 2005055387 A1 WO2005055387 A1 WO 2005055387A1 EP 2004053147 W EP2004053147 W EP 2004053147W WO 2005055387 A1 WO2005055387 A1 WO 2005055387A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch
- consumer
- input
- circuit
- output
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
- H02H5/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection responsive to deterioration or interruption of earth connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Definitions
- the invention relates to a circuit arrangement and a method for controlling an inductive consumer, in particular a protective circuit which prevents an actuator from being switched on in the event of a fault.
- Electrical consumers and actuators are switched on and off by electronic control units.
- electrical consumers such as the excitation coil of a fuel injection valve or a starter motor
- a switching element which is connected in series with the consumer.
- This switching element is often part of a control unit which is connected on the input side to the two poles of a supply voltage source. Often only one potential of the supply voltage source is fed to the consumer via the control unit.
- the second potential is usually supplied to the consumer via the body, which is at ground potential.
- a known solution to this problem is to provide such a safety-critical consumer with a second ground line, so that the consumer is electrically connected directly to the ground of the control device.
- this proves to be complex and very costly for several consumers.
- the object is achieved by a circuit arrangement having the features of claim 1 and by a method having the features of claim 5.
- the circuit arrangement has a first and a second input and an output.
- the first input is electrically connected to a first potential of a supply voltage source and the second input is electrically connected to a second potential of the supply voltage source.
- the consumer 80 is connected on the one hand to the output and on the other hand to the second potential of the supply voltage source.
- the circuit arrangement further has a first switch, which can be controlled by a signal, for switching the consumer on and off, which is connected on the one hand to the first input and on the other hand to the output of the circuit arrangement.
- a first switch which can be controlled by a signal, for switching the consumer on and off, which is connected on the one hand to the first input and on the other hand to the output of the circuit arrangement.
- the circuit arrangement has a free-wheeling circuit which is connected on the one hand to the second input and on the other hand to the output of the circuit arrangement and has a second switch. If the consumer is switched off by switching off the first switch, the energy stored in the consumer is discharged via this freewheeling circuit. For this purpose, the second switch is closed.
- a monitoring unit monitors a potential in the freewheeling circuit and opens or closes the second switch depending on
- the second switch is preferably controlled in such a way that the freewheeling circuit is switched on during the switching off phase of the consumer and is switched off when the freewheeling circuit is not required.
- the monitoring unit switches the second switch off or on when the voltage falls below or exceeds a predetermined voltage threshold. In this way, it is sufficient ⁇ that is, that is not accidentally turned on in the event of an error at a mass loss of L15 circuitry of consumers.
- the monitoring unit also has a time delay element which, after falling below or exceeding the predetermined
- L20 th voltage threshold turns off the second switch after a predetermined period of time. This ensures that the energy stored in the inductive consumer is discharged via the freewheeling circuit during this period. After this unloading process, the freewheeling circuit preferably remains
- L25 is interrupted by the open second switch and current flow through this free-wheeling circuit to the consumer is prevented.
- the circuit arrangement preferably has a logic unit
- L35 which only enables the consumer to be switched on if an unintentional switch-on in the event of an error is excluded.
- the first switch has received a switch-off signal and then a switch-on signal and / or the monitoring unit
- FIG. 1 shows an embodiment of a circuit arrangement according to the invention
- FIG. 2 shows a flowchart which shows the steps of an exemplary embodiment of the method according to the invention
- FIG. 3 shows an exemplary embodiment of a time delay element and a logic unit.
- FIG. 1 shows an exemplary embodiment of a circuit arrangement L55 for controlling an inductive consumer 5.
- the consumer 5 is described here instead as a series connection of an inductor L and a resistor R.
- the circuit arrangement has a first input 1 and a
- L60 NEN second input 2 each of which is electrically connected to a potential of a supply voltage source, here an accumulator 6.
- a potential of a supply voltage source here an accumulator 6.
- the first connection 1 with the positive pole + of the accumulator 6 and the second input 2 with the negative pole - of the accumulator 6 are electrically connected.
- the electronics arranged in the control unit between inputs 1 and 2 are shown here as equivalent resistor 7.
- the equivalent resistor 7 corresponds to a parallel connection of all components supplied directly or indirectly by the accumulator 6.
- the circuit arrangement also has a first switch S1, which is electrically connected on the one hand to the first input 1 and on the other hand to an output 3.
- the consumer 5 is on the one hand with the output 3 and on the other hand with ground
- a free-wheeling circuit FLK is arranged between the second input 2 and the output 3.
- This free-wheeling circuit FLK here has a series connection of a second switch S2 and a diode D F. Is the
- the first switch S1 embodied here as a so-called “highside” switch, can also be embodied as a "low-side” switch.
- the first switch S1 and the second switch S2 are designed as 220 controllable electrical switches, for example as power MOS field-effect transistors (MOSFETS) or as insulated gate bipolar transistors (IGBTs).
- MOSFETS power MOS field-effect transistors
- IGBTs insulated gate bipolar transistors
- the control connections of these switches S1, S2 are controlled by a control circuit 8.
- the first switch 225 S1 is electrically connected to the control circuit 8 via a first control line UST1 and the second switch S2 via a second control line UST2.
- the control circuit 8 has a logic unit 9, a 230 microcontroller 10, a supply voltage monitor 11 and a time delay element 12.
- the supply voltage monitor 11 has two inputs, a first input UE, which is electrically connected to the first input 1 of the circuit arrangement, and a second input UA, 235, which is electrically connected to the output 3 of the circuit arrangement.
- the supply voltage monitor 11 also has two outputs. One of these outputs U Ef ReSet is connected to the
- the 240 linkage unit 9 is electrically connected and the second U A , si gna i is electrically connected to time delay element 12.
- the microcontroller 10 has at least one output ENA, which is connected to the logic unit 9.
- the linking unit 9 is further connected to the control line USTl
- control circuit 8 connected.
- FIG. 2 shows a flow chart, on the basis of which the method steps> 55 required for operating the consumer 5 are explained in more detail.
- the start of the process is marked with "Start”.
- the first switch S1 is switched on (step 101).
- two possible error cases can be distinguished, namely the loss of mass when the consumer 5 is switched on and the loss of mass of the circuit arrangement when the consumer 5 is switched off.
- step 102 checks whether the microprocessor 10 has a switch-off signal.
- the second switch S2 is also switched off after a predetermined time period ⁇ t, during which the energy stored in the inductance L is essentially reduced via the free-wheeling circuit FLK. So that would also be the case
- step 104 ' an inadvertent switching on of the consumer 5 in the event of an interruption in the connecting line between the negative connection - the accumulator 6 and the input 2 is excluded.
- the predefined time period ⁇ t is selected here such that after this time period ⁇ t the inductance L is largely discharged. 285
- the time period ⁇ t can be selected in the following range:
- time period ⁇ t is chosen too long, it would be possible to switch it on again during this time in the event of an error.
- the time period ⁇ t must therefore be so dimensionally be renated, as necessary for energy reduction in the consumer 5.
- step 102 If a switch-on signal ENA of the microcontroller 10 is still present in step 102, a branch is made to step 103 and the output voltage U A is checked there. In normal operation, the output voltage 300 U A corresponds approximately to the input voltage U E.
- the output voltage U A corresponds approximately to the forward voltage of the freewheeling diode D F.
- This forward voltage depends on the type of the freewheeling diode D F and is approximately - 0.7 volts in the exemplary embodiment described here. Depending on this forward voltage, the diode D turns on
- the first switch S1 is first opened, then after the predetermined time period ⁇ t, which, as already described, depends on the discharge time t en ti ad e of the inductor L, the second switch S2 is opened, and thus a current
- an error flag can also be set here, via which the interruption of the ground line is reported to a control unit.
- step 202 If the first switch S1 is not switched on in step 101, a branch is made to step 202, in which it is checked whether the second switch S2 is closed. If the switch S2 is closed, it is checked again in step 203 whether the
- the second switch S2 can only be opened after the predetermined time period ⁇ t.
- step 203 ′ a restart signal from the microcontroller 10 is waited for.
- This reclosure signal can be, for example, a change in state of the switch-on signal ENA from state 0 to state 1. This prevents the 355 consumer from being switched on again unintentionally after a loss of mass.
- the implementation of the method described here can be started, for example, as a function of an operating state of the consumer 5 or of the microcontroller 10 or also by an external control signal 360.
- FIG. 3 shows an embodiment of the time delay element 12 and the linking unit 9. 365 If the switch S1 is turned on, a voltage U A is present at the consumer 5, which corresponds approximately to the input voltage U E.
- the time delay element 12 has a power supply input 1 ′ which is independent of the switching element S1 and which serves to supply the circuit arrangement with voltage. be-
- a series circuit comprising a first resistor R1, a diode D1 connected in the reverse direction, a second resistor R2 and a third resistor R3 is arranged.
- the switch S2 is designed here as an n-channel MOSFET, with its drain connection
- the gate connection is connected to the center tap of a series circuit consisting of a fourth resistor R4 and a first capacitor C1, the
- the base-emitter path of a transistor T1 is arranged parallel to the second resistor R2.
- the transistor T1 is a pnp transistor.
- the base connection of the transistor T1 is connected to the tap between the second resistor R2 and the diode Dl.
- the emitter connection is connected to the tap between the second and third resistors R2 and R3.
- the collector terminal of the transistor T1 is connected to the Output 3 facing connection of the freewheeling diode D F connected.
- the circuit arrangement is dimensioned such that the switch S2 is turned on before a larger amount of energy has been stored in the inductance L of the consumer 5.
- the supply voltage monitor 11 supplies gang U E , ReSet a signal with a high level, as long as the 440 supply voltage VCC is sufficiently high.
- a low level at the input U E , R e se t stands for a supply voltage VCC which is below a predetermined voltage threshold.
- the signal ENA coming from the microcontroller 10 is inverted in a first inverter 13 and fed to an AND gate 14.
- the second input of the AND gate 14 is connected to the output U E , reset of the supply voltage monitor 11.
- the output of the AND gate 14 has one
- the voltage levels at the outputs are assigned to levels 455 "Low” and "High” as follows:
- the output signal of the AND gate 14 is fed to the set input S of a D flip-flop 15.
- the output signal of the first inverter 13 is fed to the clock input CLK of the D flip-flop 15 via a low pass consisting of a resistor R6 and a capacitor C2 and two further inverters 16 and 17.
- the inverted output Q is fed back to the D input D of the D flip-flop 15.
- the output Q of the D flip-flop 15 is here connected to the control line U S n.
- the switch S1 remains switched off.
- the first switch S1 is switched on with a negative edge at the input ENA, i. H. with a change from a high to a low level or with a positive edge at the clock input Clk of the D flip-flop.
- two inverters 16, 17 are connected as Schmitt trigger inverters, by means of which the edge steepness at the clock 500 input CLK is improved.
- a non-inverting Schmitt trigger gate can also be arranged instead of the two inverters.
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/581,473 US20070103988A1 (en) | 2003-12-01 | 2004-11-29 | Circuit arrangement and method for controlling an inductive load |
EP04819691A EP1690326A1 (de) | 2003-12-01 | 2004-11-29 | Schaltungsanordnung und verfahren zum steuern eines induktiven verbrauchers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10356089A DE10356089B4 (de) | 2003-12-01 | 2003-12-01 | Schaltungsanordnung und Verfahren zum Steuern eines induktiven Verbrauchers |
DE10356089.0 | 2003-12-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005055387A1 true WO2005055387A1 (de) | 2005-06-16 |
Family
ID=34625450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/053147 WO2005055387A1 (de) | 2003-12-01 | 2004-11-29 | Schaltungsanordnung und verfahren zum steuern eines induktiven verbrauchers |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070103988A1 (de) |
EP (1) | EP1690326A1 (de) |
KR (1) | KR20060109974A (de) |
CN (1) | CN1890852A (de) |
DE (1) | DE10356089B4 (de) |
WO (1) | WO2005055387A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2689970A1 (de) * | 2012-07-08 | 2014-01-29 | Manfred Zimmer | Schaltungsanordnung zum Steuern einer induktiven Last mit Freilaufkreis |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006008113B4 (de) * | 2006-02-20 | 2010-06-02 | Willtek Communications Gmbh | Antennenkoppler sowie Positioniervorrichtung dafür |
DE102007056516B4 (de) * | 2006-11-22 | 2013-11-28 | Ifm Electronic Gmbh | Auswerteanordnung |
US8259427B2 (en) * | 2009-09-04 | 2012-09-04 | Freescale Semiconductor, Inc. | Power transistor circuit |
US8351168B2 (en) | 2010-04-27 | 2013-01-08 | Freescale Semiconductor, Inc. | Open circuit detector and method therefore |
US8514530B2 (en) * | 2011-04-28 | 2013-08-20 | Freescale Semiconductor, Inc. | Load control and protection system |
US8917135B2 (en) * | 2013-05-14 | 2014-12-23 | Infineon Technologies Austria Ag | Circuit with a plurality of diodes and method for controlling such a circuit |
KR101696977B1 (ko) * | 2014-10-08 | 2017-01-16 | 주식회사 엘지화학 | 절연 스위치 제어 장치 및 방법 |
CN107452741B (zh) * | 2017-07-25 | 2019-01-04 | 宁波中车时代传感技术有限公司 | 一种断线保护电路 |
CN108901061A (zh) * | 2018-05-31 | 2018-11-27 | 深圳市文鼎创数据科技有限公司 | 一种nfc装置 |
CN114221315A (zh) * | 2021-12-14 | 2022-03-22 | 广东福德电子有限公司 | 一种高效直流阻感负载快速断开方法 |
SE2250744A1 (en) * | 2022-06-20 | 2023-12-21 | Blixt Tech Ab | Electrical circuit for electrical safety |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5166852A (en) * | 1989-10-31 | 1992-11-24 | Kabushiki Kaisha Toshiba | Electronic circuit device for protecting electronic circuits from unwanted removal of ground terminal |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54159157A (en) * | 1978-06-07 | 1979-12-15 | Toshiba Corp | Drive circuit for inductive load |
DE2828678A1 (de) * | 1978-06-30 | 1980-04-17 | Bosch Gmbh Robert | Verfahren und einrichtung zum betrieb eines elektromagnetischen verbrauchers, insbesondere eines einspritzventils in brennkraftmaschinen |
US4585986A (en) * | 1983-11-29 | 1986-04-29 | The United States Of America As Represented By The Department Of Energy | DC switching regulated power supply for driving an inductive load |
US4691129A (en) * | 1986-03-19 | 1987-09-01 | Siemens Aktiengesellschaft | Drive circuit for a power MOSFET with source-side load |
JPH06338117A (ja) * | 1993-05-28 | 1994-12-06 | Sony Corp | ディスク装置 |
DE4415386C2 (de) * | 1994-05-02 | 1998-07-02 | Knorr Bremse Systeme | Elektronisches Steuergerät für Kraftfahrzeuge, insbesondere elektronisches Bremssteuergerät |
DE4428115C2 (de) * | 1994-08-09 | 1997-10-16 | Hella Kg Hueck & Co | Steuergerät mit einer Schaltungsanordnung zum Schutz des Steuergerätes bei Unterbrechung der Steuergerätemasse |
DE19735541A1 (de) * | 1997-08-16 | 1999-02-18 | Bosch Gmbh Robert | Schaltung zum Abschalten einer MOSFET-Endstufe |
DE10112141A1 (de) * | 2001-03-14 | 2002-09-19 | Bosch Gmbh Robert | Vorrichtung zur Spannungswandlung |
-
2003
- 2003-12-01 DE DE10356089A patent/DE10356089B4/de not_active Expired - Fee Related
-
2004
- 2004-11-29 US US10/581,473 patent/US20070103988A1/en not_active Abandoned
- 2004-11-29 CN CNA2004800356472A patent/CN1890852A/zh active Pending
- 2004-11-29 KR KR1020067013101A patent/KR20060109974A/ko not_active Application Discontinuation
- 2004-11-29 EP EP04819691A patent/EP1690326A1/de not_active Withdrawn
- 2004-11-29 WO PCT/EP2004/053147 patent/WO2005055387A1/de active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5166852A (en) * | 1989-10-31 | 1992-11-24 | Kabushiki Kaisha Toshiba | Electronic circuit device for protecting electronic circuits from unwanted removal of ground terminal |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2689970A1 (de) * | 2012-07-08 | 2014-01-29 | Manfred Zimmer | Schaltungsanordnung zum Steuern einer induktiven Last mit Freilaufkreis |
Also Published As
Publication number | Publication date |
---|---|
EP1690326A1 (de) | 2006-08-16 |
US20070103988A1 (en) | 2007-05-10 |
CN1890852A (zh) | 2007-01-03 |
DE10356089B4 (de) | 2005-11-03 |
DE10356089A1 (de) | 2005-06-30 |
KR20060109974A (ko) | 2006-10-23 |
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