EP0906510B1 - Schaltungsanordnung einer zündendstufe, insbesondere für eine zündschaltung eines kraftfahrzeugs - Google Patents
Schaltungsanordnung einer zündendstufe, insbesondere für eine zündschaltung eines kraftfahrzeugs Download PDFInfo
- Publication number
- EP0906510B1 EP0906510B1 EP97930320A EP97930320A EP0906510B1 EP 0906510 B1 EP0906510 B1 EP 0906510B1 EP 97930320 A EP97930320 A EP 97930320A EP 97930320 A EP97930320 A EP 97930320A EP 0906510 B1 EP0906510 B1 EP 0906510B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transistor
- circuit arrangement
- darlington
- base
- ignition
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
- F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
- F02P3/0442—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices using digital techniques
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
- F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices
Definitions
- the invention relates to a circuit arrangement of a Ignition output stage, in particular for an ignition circuit of a motor vehicle, with the in the preamble of the claim 1 mentioned features.
- Darlington Darlington transistor stages
- a primary winding of an ignition coil drive Depending on whether the primary winding via the collector of the Darlington (low-side) or the Darlington (high-side) emitters can be controlled, is in a low-side ignition or a high-side ignition distinguished.
- An inductive ignition system is known from US Pat. No. 4,738,239 to be provided for an internal combustion engine.
- an N-channel field effect transistor in series with a primary winding one Ignition coil connected.
- An npn transistor is with its Collector emitter circuit between the gate and the source of the Field effect transistor connected.
- the present invention is based on the object thermal coupling of the ignition output stage to a ground to simplify connected heat sinks.
- control circuit according to the invention with the in claim 1 features mentioned has the advantage that the Control circuit from one when the Darlington is switched off whose base applied negative reverse voltage decoupled can be and at the same time an integration of the Decoupling element with which Darlington can be realized.
- an NPN Darlington is provided, the collector of which with the Positive pole of a voltage source and its emitter with the first Connection of the primary winding of the ignition coil is connected, wherein the second connection of the primary winding to ground and the The Darlington is controlled via a decoupling element, it is advantageously possible, in particular, through the the possibility of integrating the circuit arrangement Darlington, the decoupling element and the entire Control circuit, in a monolithically integrated component one easy to manufacture and one inexpensive To enable assembly of the entire ignition stage.
- the control circuit according to the invention draws is also characterized by high reliability the ignition stage for those that occur in extreme operation thermal loads.
- FIG. 1 shows the circuit arrangement 10 of an ignition output stage an internal combustion engine.
- Figure 1 is only one ignition stage shown, depending on A corresponding number of cylinders of the internal combustion engine Number of ignition output stages are provided.
- the output signal of an engine control indicated here is present at an input connection 12.
- the connection 12 is connected via a resistor R 1 to the base of a double Darlington T 1 .
- a lying between the resistor R1 and the base of transistor T 1 node K 1 is the one hand, connected via a resistor R2 and a Zener diode D 1 to the positive terminal 14 of a voltage source / for example a motor vehicle battery.
- the node K 1 is connected to the collector of a transistor T 2 , the emitter of which is connected to ground and the base of which is connected via a resistor R 3 to the node K 1 and the collector of a further transistor T 3 .
- the emitter of transistor T 3 is grounded, and the base of transistor T 3 is connected to input terminal 12.
- the node K 1 is also connected to ground via a series connection of diodes D 2 and D 3 and a resistor R 4 .
- the collector of transistor T 1 is connected to the base of a lateral pnp transistor T 4 .
- the emitter of transistor T 1 is connected to ground.
- the emitter of the transistor T 4 is connected to the positive pole 1 4
- the collector of the transistor T 4 is connected to the base of a triple Darlington T 5 .
- the collector of the Darlington T 5 is connected to the positive pole 14.
- a Zener diode D 4 is located in the base collector section of the Darlington T 5 .
- the emitter of Darlington T 5 is connected to one terminal of a primary winding 16 of an ignition coil 18, the other terminal of which is connected to ground.
- the emitter of Darlington T 5 is connected to the emitter of a further transistor T 6 , the collector of which is connected to the base of Darlington T 5 .
- the base of the transistor T 6 is connected to the positive pole 14 via a resistor R 5 and a Zener diode D 5 .
- a control signal is provided by the engine electronics and is intended to trigger the ignition of a spark plug of a motor vehicle connected to the circuit arrangement 10.
- the resistor R 1 is a high-resistance resistor with, for example, 500 to 1000 ohms and serves as an interference suppression resistor to avoid incorrect triggering of the transistor T 1 . Its base becomes insensitive to rapid voltage peaks due to the resistor R 1 .
- the transistor T 1 the positive drive signal at the input terminal 12 is converted into an inverted signal which is used to drive the transistor T 4 , that is to say that the latter is switched on.
- the Darlington T 5 which drives the ignition coil 18 is switched on.
- the ignition coil 18 is thus controlled via the switching chain of the transistors T 1 , T 4 and T 5 depending on the presence of a positive input signal.
- a reclosure lock occurs via the transistor T 6 connected to the base-emitter path of the Darlington T 5 and the series connection of the resistor R 5 and the Zener diode D 5 connecting the base thereof to the positive pole 14.
- the base and the emitter of the Darlington T 5 are short-circuited via the transistor T 6 .
- the lateral pnp transistor T 4 forms a coupling element which decouples the control circuit shown on the left in FIG. 1 from the Darlington T 5 when it is switched off.
- the series connection of the diodes D 2 , D 3 and the resistor R 4 forms a current mirror with which the collector current of the transistor T 1 is set and limited.
- the diodes D 2 and D 3 are switched in the forward direction, that is, their anodes are connected to the base of the transistor T 1 .
- the collector current of the transistor T 1 is set to a value dependent on the resistance R 4 , for example 100 mA.
- the series connection of the Zener diode D 1 and the resistor R 2 serves to protect the circuit arrangement 10 against overvoltages in the voltage supply network. If an overvoltage (load dump) occurs in the voltage supply network, the value of which is greater than the breakdown voltage of the Zener diode D 1 , this is derived.
- the circuit of the transistors T 2 and T 3 and the resistor R 3 connected to the node K 1 at the same time form a logic circuit which, depending on the presence of a positive control signal at the input connection 12, either the current caused by the overvoltage (load dump current) in the base of transistor T 1 or against ground.
- the transistor T 2 is turned on , so that the load dump current can be diverted to ground via the node K 1 and the transistor T 2 .
- the load dump current is derived via the node K 1 into the base of the transistor T 1 .
- FIG. 2 partially shows the layout of the circuit arrangement 10 shown in FIG. 1, by means of which the integration of the Darlington T 5 and the decoupling transistor T 4 in a monolithically integrated component is to be clarified.
- FIG. 2 shows sections of a wafer 20.
- the wafer 20 consists of an n-substrate 22 with an n - -doping.
- a region 24 with p-doping is structured in the n-substrate 22.
- the region 24 forms the base of the Darlington T 5 and at the same time the collector of the decoupling transistor T 4 .
- the base of the Darlington T 5 is partially overlapped by a cover electrode 26 which is connected to the positive pole 14 shown in FIG. 1 via an n + contact strip 28.
- the cover electrode 26 thus forms the collector of the Darlington T 5 .
- a further region 30 with p-doping is structured in the wafer 20.
- the region 30 is structured outside the region of the cover electrode 26 on the side facing away from the p-doped region 24.
- the region 30 forms the emitter of the decoupling transistor T 4, while the n-substrate 22 between the regions 24 and 30 forms the base of the transistor T. 4
- a lateral pnp transistor T 4 is thus created, which is integrated in the edge region of the Darlington T 5 .
- the area 30 is encompassed on three sides by an n + ring 32, which is likewise contacted with the positive pole 14 shown in FIG. 1.
- the area 30 is encompassed by a conductor track 34 which is in contact with the n + contact strip 28.
- the contact can be made, for example, via contact windows 36 indicated here on both sides of area 30.
- the conductor track 34 leads to the collector of the transistor T 1, which is no longer shown in the detail in FIG. 2.
- the area 30 is provided with a wedge-shaped structure 38 directed in the direction of the n + contact strip 28.
- transistors T 4 and T 5 are implemented as follows using the layout shown in FIG. 2:
- the potential of the n-substrate 22 between the regions 24 and 30 must be brought to a lower voltage than the supply voltage (14 volts) applied to the n + contact strip 28.
- the base current of the lateral transistor T 4 is fed from the transistor T 1 arranged outside the high-blocking region of the Darlington T 5 .
- the n + region between the regions 24 and 30 is drawn to a more negative potential than the entire substrate 22.
- the transistor T 4 the emitter of the region 30, the collector of which Area 24 and the base of which is the substrate 22 lying between these areas is thus controlled.
- the wedge-shaped structure 38 of the area 30 ensures that in a zone between the two contact windows 36 in the middle with a lower potential drop, a compensation takes place compared to the zones in the direction of the contact window 36 with a higher potential drop. It is thus achieved that a more uniform lateral current can flow between the regions 30 and 24 and thus an improvement in the gain is achieved.
- the distance between the areas 30 and 24 must have a minimum distance due to the expansion of the space charge zone in the blocking operation of the Darlington T 5 .
- this is advantageously at least 55 ⁇ m. This results in a current gain of the lateral transistor T 4 of 0.1.
- a drive current for the Darlington T 5 via the locking edge structure of Darlington T 5 can be brought without disturbing the blocking behavior of Darlington T 5 in the shut-off case. Due to the current gain of approx. 0.1, a drive current for the Darlington T 5 of approx. 10 mA can be generated with a collector current of the inverting transistor T 1 of approx. 100 mA. The Darlington T 5 can be operated with approx. 10 A.
- the further circuit elements of the circuit arrangement 10 explained in FIG. 1 and not shown in FIG. 2 can be arranged on the wafer 20 outside the area encompassed by the cover electrode 26.
- a divider resistor of the cover electrode 26 can very advantageously also serve as a current limiting resistor R 5 for the short-circuit transistor T 6 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bipolar Integrated Circuits (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
- Figur 1
- ein Schaltbild einer Zündendstufe und
- Figur 2
- eine schematische Draufsicht auf einen Teil der Zündendstufe in einem monolithisch integrierten Bauelement.
Claims (9)
- Schaltungsanordnung einer Zündendstufe für ein Kraftfahrzeug mit einem Transistor zum Ansteuern der Primärwicklung einer Zündspule, wobei der Kollektor des Transistors mit dem Pluspol (14) einer Spannungsquelle, wobei der Emitter des Transistors mit einem ersten Anschluß der Primärwicklung (16) der Zündspule (18) verbunden ist, während der zweite Anschluß der Primärwicklung (16) an Masse liegt, und wobei die Basis des Transistors über ein Entkopplungselement mit einer Ansteuerschaltung verbunden ist, dadurch gekennzeichnet, daß der Transistor (T5) ein npn-Darlington ist und daß.das Entkopplungselement ein lateraler pnp-Transistor (T4) ist, dessen Kollektor mit der Basis der Darlington (T5), dessen Emitter mit dem Pluspol (14) der Spannungsquelle verbunden ist und dessen Basis von der Ansteuerschaltung ansteuerbar ist.
- Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Ansteuerschaltung einen Transistor (T1) aufweist, dessen Kollektor mit der Basis des pnp-Transistors (T4), dessen Emitter mit Masse verbunden ist und dessen Basis über ein die Zündung auslösendes Steuersignal ansteuerbar ist.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der npn-Darlington (T5) und der laterale pnp-Transistor (T4) in einem Wafer (20) monolithisch integriert sind.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein p-dotierter Bereich (24) ein einem n-Substrat (22) gleichzeitig die Basis des Darlington (T5) und der Kollektor des Transistors (T4) ist.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein weiterer p-dotierter Bereich (30) im Abstand zu dem Bereich (24) angeordnet ist, der den Emitter des Transistors (T4) bildet und ein zwischen den Bereichen (24, 30) liegender n-Substratabschnitt (22), der durch einen n+-Kontaktstreifen (28) abgegrenzt ist, die Basis des Transistors (T4) bildet.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der n+--Kontaktstreifen (28) eine Deckelektrode (26) kontaktiert, die über dem n-Substrat (22) angeordnet ist, das zwischen den p-dotierten Bereichen (24, 30) liegt.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der p-dotierte Bereich (30) außer an einer dem n+-Kontaktstreifen (28) zugewandten Seite von einem n+-Ring (32) umgriffen ist, der mit dem Pluspol (14) verbunden ist.
- Schaltungsanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Bereich (30) von einer weiteren Leiterbahn (34) umgriffen ist, die mit dem n+-Kontaktstreifen (28) an beiden Seiten des Bereiches (30) kontaktiert ist.
- Schaltungsanordnung nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, daß der Bereich (30) eine in Richtung des n+-Kontaktstreifens (28) gerichtete keilförmige Struktur (38) aufweist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19624530A DE19624530A1 (de) | 1996-06-20 | 1996-06-20 | Schaltungsanordnung einer Zündendstufe, insbesondere für eine Zündschaltung eines Kraftfahrzeugs |
| DE19624530 | 1996-06-20 | ||
| PCT/DE1997/001211 WO1997048904A1 (de) | 1996-06-20 | 1997-06-16 | Schaltungsanordnung einer zündendstufe, insbesondere für eine zündschaltung eines kraftfahrzeugs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0906510A1 EP0906510A1 (de) | 1999-04-07 |
| EP0906510B1 true EP0906510B1 (de) | 2002-12-18 |
Family
ID=7797414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97930320A Expired - Lifetime EP0906510B1 (de) | 1996-06-20 | 1997-06-16 | Schaltungsanordnung einer zündendstufe, insbesondere für eine zündschaltung eines kraftfahrzeugs |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6167876B1 (de) |
| EP (1) | EP0906510B1 (de) |
| JP (1) | JP2000512357A (de) |
| BR (1) | BR9709813A (de) |
| DE (2) | DE19624530A1 (de) |
| WO (1) | WO1997048904A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1560936A (en) * | 1975-07-31 | 1980-02-13 | Lucas Industries Ltd | Spark ignition system for an internal combustion engine |
| DE3137550A1 (de) | 1981-09-22 | 1983-03-31 | Robert Bosch Gmbh, 7000 Stuttgart | Zuendanlage fuer brennkraftmaschinen |
| DE3325275A1 (de) * | 1983-07-13 | 1985-01-24 | Robert Bosch Gmbh, 7000 Stuttgart | Schaltungsanordnung zur zuendung von brennkraftmaschinen |
| US4738239A (en) * | 1987-07-31 | 1988-04-19 | Delco Electronics Corporation | Ignition system |
| DE3735631A1 (de) * | 1987-10-21 | 1989-05-03 | Bosch Gmbh Robert | Zuendeinrichtung fuer eine brennkraftmaschine |
| US5529046A (en) * | 1995-01-06 | 1996-06-25 | Xerox Corporation | High voltage ignition control apparatus for an internal combustion engine |
| JP3216966B2 (ja) * | 1995-04-04 | 2001-10-09 | 三菱電機株式会社 | 内燃機関用点火装置 |
| DE19652267A1 (de) * | 1996-12-16 | 1998-06-18 | Bosch Gmbh Robert | Induktives Spulenzündsystem für einen Motor |
-
1996
- 1996-06-20 DE DE19624530A patent/DE19624530A1/de not_active Withdrawn
-
1997
- 1997-06-16 US US09/202,671 patent/US6167876B1/en not_active Expired - Fee Related
- 1997-06-16 WO PCT/DE1997/001211 patent/WO1997048904A1/de not_active Ceased
- 1997-06-16 JP JP10502077A patent/JP2000512357A/ja active Pending
- 1997-06-16 EP EP97930320A patent/EP0906510B1/de not_active Expired - Lifetime
- 1997-06-16 DE DE59709017T patent/DE59709017D1/de not_active Expired - Fee Related
- 1997-06-16 BR BR9709813A patent/BR9709813A/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997048904A1 (de) | 1997-12-24 |
| US6167876B1 (en) | 2001-01-02 |
| BR9709813A (pt) | 1999-08-10 |
| EP0906510A1 (de) | 1999-04-07 |
| JP2000512357A (ja) | 2000-09-19 |
| DE59709017D1 (de) | 2003-01-30 |
| DE19624530A1 (de) | 1998-01-02 |
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