DE69613664T2 - Process and plant for removing nitrogen from natural gas - Google Patents
Process and plant for removing nitrogen from natural gasInfo
- Publication number
- DE69613664T2 DE69613664T2 DE69613664T DE69613664T DE69613664T2 DE 69613664 T2 DE69613664 T2 DE 69613664T2 DE 69613664 T DE69613664 T DE 69613664T DE 69613664 T DE69613664 T DE 69613664T DE 69613664 T2 DE69613664 T2 DE 69613664T2
- Authority
- DE
- Germany
- Prior art keywords
- natural gas
- heat exchanger
- nitrogen
- pipeline
- liquid oxygen
- 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 - Fee Related
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 54
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003345 natural gas Substances 0.000 title claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 2
- 239000007792 gaseous phase Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/066—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/0605—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the feed stream
- F25J3/061—Natural gas or substitute natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/0635—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 1 carbon atom or more
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/50—Oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
- F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Entfernung von Stickstoff aus Erdgas durch Kryokondensation.The invention relates to a method and a device for removing nitrogen from natural gas by cryocondensation.
Stickstoff ist im Erdgas unerwünscht, da er nicht zu einer höheren Flammentemperatur beiträgt, sondern im Gegenteil ein Ballaststoff ist, weshalb er daraus entfernt werden muss.Nitrogen is undesirable in natural gas because it does not contribute to a higher flame temperature, but on the contrary is a bulk material, which is why it must be removed.
Darüber hinaus ist Stickstoff dafür bekannt, dass er bei hohen Flammentemperaturen an Sauerstoff bindet, wobei sich toxische NOX-Verbindungen bilden.In addition, nitrogen is known to bind to oxygen at high flame temperatures, forming toxic NOX compounds.
Daher ist klar, dass Stickstoff für den Verbrennungsvorgang ein äußerst unerwünschtes Gas ist.It is therefore clear that nitrogen is an extremely undesirable gas for the combustion process.
Es ist allgemein bekannt, dass Oxyfuel ein vielfach angewendetes Verfahren ist, bei welchem während des Verbrennungsvorgangs anstelle von Luft reiner Sauerstoff mit dem Ziel eingesetzt wird, den Wirkungsgrad von Öfen zu erhöhen. Dabei ist selbstverständlich, dass auch hier wieder der in der Luft vorhandene Stickstoff (etwa 79 Vol.-%) nur Ballast ist, der, außer oben genannten Nachteilen zu Wärmeverlusten führt, da der Stickstoff als aufgeheiztes Gas an die Atmosphäre abgegeben wird.It is generally known that oxyfuel is a widely used process in which pure oxygen is used instead of air during the combustion process with the aim of increasing the efficiency of furnaces. It goes without saying that here too the nitrogen present in the air (around 79% by volume) is only ballast, which, in addition to the disadvantages mentioned above, leads to heat losses, since the nitrogen is released into the atmosphere as a heated gas.
In US-A-5 036 671 ist ein Verfahren zur Herstellung eines Methan-angereicherten flüssigen Stroms aus einem Strom aus stickstoffhaltigem Erdgas beschrieben. Dieses wird bei einem Druck oberhalb des Atmosphärendrucks verflüssigt und danach auf einen niedrigeren Druck entspannt, wodurch sich der Stickstoff in der Dampfphase anreichert.US-A-5 036 671 describes a process for producing a methane-enriched liquid stream from a stream of nitrogen-containing natural gas. This is liquefied at a pressure above atmospheric pressure and then expanded to a lower pressure, whereby the nitrogen is enriched in the vapor phase.
Deshalb liegt der Erfindung die Entfernung des Stickstoffs aus Erdgas und die Verwendung von reinem Sauerstoff, was zu einem erhöhten Wirkungsgrad führt, als Aufgabe zugrunde.Therefore, the invention is based on the removal of nitrogen from natural gas and the use of pure oxygen, which leads to an increased efficiency.
Zu diesem Zweck muss der Stickstoff, der im Erdgas enthalten ist, entfernt werden, bevor dieses am Verbrennungsvorgang teilnimmt.For this purpose, the nitrogen contained in natural gas must be removed before it takes part in the combustion process.
Dazu werden erfindungsgemäß ein Verfahren nach Patentanspruch 1 und eine Vorrichtung nach Patentanspruch 4 bereitgestellt.For this purpose, according to the invention, a method according to patent claim 1 and a device according to patent claim 4 are provided.
Gemäß dem Stand der Technik wird die Kryokondensation von Kohlenwasserstoffen unter Verwendung von kaltem Stickstoff als Kühlmittel durchgeführt.According to the state of the art, the cryocondensation of hydrocarbons is carried out using cold nitrogen as coolant.
Erfindungsgemäß werden die oben genannten Nachteile wirksam behoben.According to the invention, the above-mentioned disadvantages are effectively remedied.
Es hat sich gezeigt, dass das erfindungsgemäße Verfahren für die Entfernung des Stickstoffs aus Erdgas mit einem Stickstoffgehalt von etwa 14 Vol.-% besonders geeignet ist.It has been shown that the process according to the invention is particularly suitable for the removal of nitrogen from natural gas with a nitrogen content of about 14 vol.%.
Der allgemeine erfindungsgemäße Gedanke besteht darin, den flüssigen Sauerstoff in einer Kryokondensationsanlage zu verdampfen, wodurch die Kohlenwasserstoffe kondensieren. Nach dem Erwärmen können die kondensierten Kohlenwasserstoffe zusammen mit dem gasförmigen Sauerstoff, der sich entwickelt hat, dem Verbrennungsvorgang zugeleitet werden.The general idea of the invention is to evaporate the liquid oxygen in a cryocondensation plant, whereby the hydrocarbons condense. After heating, the condensed hydrocarbons can be fed into the combustion process together with the gaseous oxygen that has evolved.
Das zu behandelnde Erdgas wird vorzugsweise in einem Wärmeaustauscher auf etwa -80ºC vorgekühlt, bevor es mit flüssigem Sauerstoff auf etwa -165ºC abgekühlt wird.The natural gas to be treated is preferably pre-cooled in a heat exchanger to about -80ºC before being cooled with liquid oxygen to about -165ºC.
Im Vergleich mit dem Stand der Technik hat das erfindungsgemäße Verfahren folgende Vorteile:Compared with the prior art, the inventive method has the following advantages:
1) Die toxischen NOX-Verbindungen werden auf ein Minimum verringert.1) The toxic NOX compounds are reduced to a minimum.
2) Aus einem Erdgas mit niedrigem kalorischem Wert wie dem aus der Nordsee wird ein hochkalorisches Erdgas erhalten.2) A natural gas with a low calorific value such as that from the North Sea is converted into a natural gas with a high calorific value.
3) Es wird ein Erdgas mit höherem Verbrennungswirkungsgrad erhalten, das besonders für eine Verwendung in Schmelzöfen der keramischen, Glas-, Stahl- und Nichteisenindustrie geeignet ist.3) A natural gas with higher combustion efficiency is obtained, which is particularly suitable for use in melting furnaces in the ceramic, glass, steel and non-ferrous industries.
Ferner betrifft die Erfindung eine Vorrichtung zur Entfernung des Stickstoffs aus Erdgas, die dadurch gekennzeichnet ist, dass sie mit einem Lagertank für flüssigen Sauerstoff versehen ist, an welchen über eine Rohrleitung ein erster Wärmeaustauscher für die Kondensation des Erdgases angeschlossen ist, das über eine Rohrleitung und den ersten Wärmeaustauscher mit einem zweiten Wärmeaustauscher verbunden ist, aus welchem das stickstofffreie kondensierte Erdgas über eine Rohrleitung, nachdem es in dem zweiten Wärmeaustauscher erwärmt worden ist, über eine Rohrleitung einen Brenner erreicht, während der flüssige Sauerstoff von dem ersten Wärmeaustauscher über eine Rohrleitung in einen dritten. Wärmeaustauscher gelangt, um als gasförmige Phase über eine Rohrleitung dem Brenner zugeleitet zu werden, wobei der gasförmige Stickstoff über eine Rohrleitung aus dem ersten Wärmeaustauscher entfernt wird.The invention further relates to a device for removing nitrogen from natural gas, which is characterized in that it is provided with a storage tank for liquid oxygen, to which a first heat exchanger for condensing the natural gas is connected via a pipeline, which is connected via a pipeline and the first heat exchanger to a second heat exchanger, from which the nitrogen-free condensed natural gas reaches a burner via a pipeline after it has been heated in the second heat exchanger, while the liquid oxygen from the first heat exchanger reaches a third heat exchanger via a pipeline in order to be fed to the burner as a gaseous phase via a pipeline, the gaseous nitrogen being removed from the first heat exchanger via a pipeline.
Die Erfindung wird anschließend unter Bezugnahme auf die Figur, die eine bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung zeigt, näher erläutert.The invention is explained in more detail below with reference to the figure, which shows a preferred embodiment of the device according to the invention.
In der Figur ist die erfindungsgemäße Vorrichtung mit der Bezugszahl 1 numeriert. Die erfindungsgemäße Vorrichtung 1 ist mit einem Lagertank 2 für flüssigen Sauerstoff versehen.In the figure, the device according to the invention is numbered with the reference number 1. The device 1 according to the invention is provided with a storage tank 2 for liquid oxygen.
Die Vorrichtung ist weiterhin mit einem ersten, zweiten und dritten Wärmeaustauscher 3, 4 und 11 versehen.The device is further provided with a first, second and third heat exchanger 3, 4 and 11.
Erdgas, beispielsweise von Groningen, mit einem Stickstoffgehalt von 14 Vol.-% wird über die Rohrleitung 7 in den ersten Wärmeaustauscher 4 geleitet, worin es auf -80ºC abgekühlt wird. Durch das Ventil 15 wird das so abgekühlte Erdgas in den zweiten Wärmeaustauscher 3 geleitet, um weiter auf -160 bis -165ºC mit Hilfe von flüssigem Sauerstoff abgekühlt zu werden, der vom Lagertank 2 über den Auslass 14 und die Rohrleitung 5 in den dritten Wärmeaustauscher geleitet wird. Die im zweiten Wärmeaustauscher 3 kondensierten Kohlenwasserstoffe werden über die Rohrleitung 6 in den ersten Wärmeaustauscher 4 geleitet, worin sie zu einem Gas werden und in dieser Form über die Rohrleitung 13 zum Brenner 12 eines Schmelzofens befördert werden.Natural gas, for example from Groningen, with a nitrogen content of 14 vol.% is fed via the pipe 7 into the first heat exchanger 4, where it is cooled to -80ºC. The natural gas thus cooled is fed through the valve 15 into the second heat exchanger 3 to be further cooled to -160 to -165ºC with the aid of liquid oxygen, which is fed from the storage tank 2 via the outlet 14 and the pipe 5 into the third heat exchanger. The hydrocarbons condensed in the second heat exchanger 3 are fed via the pipe 6 into the first heat exchanger 4, where they become a gas and in this form are conveyed via the pipe 13 to the burner 12 of a melting furnace.
Des Weiteren wird der vom zweiten Wärmeaustauscher 3 kommende Sauerstoff in flüssiger Form über die Rohrleitung 9 und das Ventil 16 zum dritten Wärmeaustauscher 11 und danach zu dem Brenner 12 geleitet. Im dritten Wärmeaustauscher 11 wird kalter gasförmiger Sauerstoff weiter auf Umgebungstemperatur erwärmt. Über die Rohrleitung 10 wir der gasförmige Sauerstoff im Brenner 12 des Schmelzofens mit den Kohlenwasserstoffen vereinigt.Furthermore, the oxygen coming from the second heat exchanger 3 is passed in liquid form via the pipe 9 and the valve 16 to the third heat exchanger 11 and then to the burner 12. In the third heat exchanger 11, cold gaseous oxygen is further heated to ambient temperature. The gaseous oxygen is combined with the hydrocarbons in the burner 12 of the melting furnace via the pipe 10.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1001940A NL1001940C2 (en) | 1995-12-20 | 1995-12-20 | Method and device for removing nitrogen from natural gas. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE69613664D1 DE69613664D1 (en) | 2001-08-09 |
| DE69613664T2 true DE69613664T2 (en) | 2002-05-29 |
Family
ID=19762059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE69613664T Expired - Fee Related DE69613664T2 (en) | 1995-12-20 | 1996-12-16 | Process and plant for removing nitrogen from natural gas |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0780649B1 (en) |
| AT (1) | ATE202840T1 (en) |
| DE (1) | DE69613664T2 (en) |
| NL (1) | NL1001940C2 (en) |
| PL (1) | PL317602A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2763081C (en) | 2011-12-20 | 2019-08-13 | Jose Lourenco | Method to produce liquefied natural gas (lng) at midstream natural gas liquids (ngls) recovery plants. |
| CA2772479C (en) | 2012-03-21 | 2020-01-07 | Mackenzie Millar | Temperature controlled method to liquefy gas and a production plant using the method. |
| CA2790961C (en) | 2012-05-11 | 2019-09-03 | Jose Lourenco | A method to recover lpg and condensates from refineries fuel gas streams. |
| CA2787746C (en) | 2012-08-27 | 2019-08-13 | Mackenzie Millar | Method of producing and distributing liquid natural gas |
| CA2798057C (en) | 2012-12-04 | 2019-11-26 | Mackenzie Millar | A method to produce lng at gas pressure letdown stations in natural gas transmission pipeline systems |
| CA2813260C (en) | 2013-04-15 | 2021-07-06 | Mackenzie Millar | A method to produce lng |
| US10288347B2 (en) | 2014-08-15 | 2019-05-14 | 1304338 Alberta Ltd. | Method of removing carbon dioxide during liquid natural gas production from natural gas at gas pressure letdown stations |
| WO2017045055A1 (en) | 2015-09-16 | 2017-03-23 | 1304342 Alberta Ltd. | A method of preparing natural gas at a gas pressure reduction stations to produce liquid natural gas (lng) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5036671A (en) * | 1990-02-06 | 1991-08-06 | Liquid Air Engineering Company | Method of liquefying natural gas |
| US5390499A (en) * | 1993-10-27 | 1995-02-21 | Liquid Carbonic Corporation | Process to increase natural gas methane content |
-
1995
- 1995-12-20 NL NL1001940A patent/NL1001940C2/en not_active IP Right Cessation
-
1996
- 1996-12-16 DE DE69613664T patent/DE69613664T2/en not_active Expired - Fee Related
- 1996-12-16 AT AT96203555T patent/ATE202840T1/en not_active IP Right Cessation
- 1996-12-16 EP EP96203555A patent/EP0780649B1/en not_active Expired - Lifetime
- 1996-12-19 PL PL96317602A patent/PL317602A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0780649B1 (en) | 2001-07-04 |
| DE69613664D1 (en) | 2001-08-09 |
| EP0780649A1 (en) | 1997-06-25 |
| ATE202840T1 (en) | 2001-07-15 |
| PL317602A1 (en) | 1997-06-23 |
| NL1001940C2 (en) | 1997-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: N.V. HOEK LOOS, SCHIEDAM, NL |
|
| 8364 | No opposition during term of opposition | ||
| 8328 | Change in the person/name/address of the agent |
Representative=s name: GROSSE, BOCKHORNI, SCHUMACHER, 81476 MUENCHEN |
|
| 8339 | Ceased/non-payment of the annual fee |