GB1257372A - - Google Patents
Info
- Publication number
- GB1257372A GB1257372A GB1257372DA GB1257372A GB 1257372 A GB1257372 A GB 1257372A GB 1257372D A GB1257372D A GB 1257372DA GB 1257372 A GB1257372 A GB 1257372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acetylene
- withdrawing
- line
- liquid
- product
- 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
Links
- 239000007789 gas Substances 0.000 abstract 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 abstract 5
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 abstract 5
- 239000007788 liquid Substances 0.000 abstract 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract 4
- 239000005977 Ethylene Substances 0.000 abstract 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 4
- 229930195733 hydrocarbon Natural products 0.000 abstract 3
- 150000002430 hydrocarbons Chemical class 0.000 abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract 2
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract 2
- 239000001257 hydrogen Substances 0.000 abstract 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 2
- 238000005201 scrubbing Methods 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000004227 thermal cracking Methods 0.000 abstract 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
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/0271—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of H2/CO mixtures, i.e. of synthesis gas
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- 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
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
- F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
-
- 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
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/0242—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 3 carbon atoms 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead 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
- 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
- F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
-
- 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
- F25J2205/50—Processes or apparatus using other separation and/or other processing means using absorption, i.e. with selective solvents or lean oil, heavier CnHm and including generally a regeneration step for the solvent or lean oil
-
- 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
- F25J2210/12—Refinery or petrochemical off-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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/62—Ethane or ethylene
-
- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
-
- 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
- F25J2270/04—Internal refrigeration with work-producing gas expansion loop
-
- 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
- F25J2270/12—External refrigeration with liquid vaporising loop
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1768460A DE1768460C2 (de) | 1968-05-16 | 1968-05-16 | Verfahren zur Gewinnung von Acetylen, Äthylen und höhere Kohlenwasserstoffe enthaltenden Gemischen aus Spaltgasen |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1257372A true GB1257372A (enrdf_load_stackoverflow) | 1971-12-15 |
Family
ID=5699753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1257372D Expired GB1257372A (enrdf_load_stackoverflow) | 1968-05-16 | 1969-05-15 |
Country Status (10)
Country | Link |
---|---|
US (1) | US3635038A (enrdf_load_stackoverflow) |
AT (1) | AT284070B (enrdf_load_stackoverflow) |
BE (1) | BE733158A (enrdf_load_stackoverflow) |
CH (1) | CH525697A (enrdf_load_stackoverflow) |
DE (1) | DE1768460C2 (enrdf_load_stackoverflow) |
ES (1) | ES367286A1 (enrdf_load_stackoverflow) |
FR (1) | FR2008664A7 (enrdf_load_stackoverflow) |
GB (1) | GB1257372A (enrdf_load_stackoverflow) |
NL (1) | NL6907467A (enrdf_load_stackoverflow) |
SE (1) | SE339070B (enrdf_load_stackoverflow) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2471568A1 (fr) * | 1979-12-06 | 1981-06-19 | Polysar Ltd | Procede de recuperation d'hydrocarbures d'un gaz residuaire |
GB2146751A (en) * | 1983-09-20 | 1985-04-24 | Petrocarbon Dev Ltd | Separation of hydrocarbon mixtures |
US4622053A (en) * | 1983-09-20 | 1986-11-11 | Petrocarbon Developments Limited | Separation of hydrocarbon mixtures |
US5030339A (en) * | 1988-10-21 | 1991-07-09 | Costain Engineering Limited | Separation of gas and oil mixtures |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1054509A (en) * | 1975-09-09 | 1979-05-15 | Union Carbide Corporation | Ethylene production with utilization of lng refrigeration |
US4336045A (en) * | 1981-06-29 | 1982-06-22 | Union Carbide Corporation | Acetylene removal in ethylene and hydrogen separation and recovery process |
DE3539553A1 (de) * | 1985-11-07 | 1987-05-14 | Linde Ag | Verfahren zum gewinnen von methylazetylen und/oder propadien |
US4714487A (en) * | 1986-05-23 | 1987-12-22 | Air Products And Chemicals, Inc. | Process for recovery and purification of C3 -C4+ hydrocarbons using segregated phase separation and dephlegmation |
US5035732A (en) * | 1990-01-04 | 1991-07-30 | Stone & Webster Engineering Corporation | Cryogenic separation of gaseous mixtures |
US5220782A (en) * | 1991-10-23 | 1993-06-22 | Bechtel Group, Inc. | Efficient low temperature solvent removal of acid gases |
US5444176A (en) * | 1992-10-28 | 1995-08-22 | Exxon Chemical Patents Inc. | Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen |
US5300469A (en) * | 1992-12-08 | 1994-04-05 | Engelhard Corporation | Composition for passivating vanadium in catalytic cracking and preparation thereof |
US5421167A (en) * | 1994-04-01 | 1995-06-06 | The M. W. Kellogg Company | Enhanced olefin recovery method |
DE19502857A1 (de) * | 1995-01-30 | 1996-08-01 | Linde Ag | Verfahren zur Gewinnung von Acetylen aus Kohlenwasserstoffen mittels thermischer Spaltung |
US7343755B2 (en) * | 2006-01-04 | 2008-03-18 | Flatplate, Inc. | Gas-drying system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA573349A (en) * | 1959-03-31 | Wolfram Arthur | Process for the separation of higher acetylene hydrocarbons | |
US1938991A (en) * | 1928-08-22 | 1933-12-12 | Robert G Wulff | Method of separating acetylene from gaseous mixtures |
US2134702A (en) * | 1936-09-29 | 1938-11-01 | Refinery Engineers Inc | Separation of hydrocarbons |
FR835832A (fr) * | 1937-04-03 | 1939-01-04 | Ig Farbenindustrie Ag | Procédé pour l'obtention d'oléfines en partant de mélanges gazeux en contenant |
US2236965A (en) * | 1938-06-10 | 1941-04-01 | Du Pont | Chemical process and apparatus |
US2236966A (en) * | 1938-06-10 | 1941-04-01 | Du Pont | Separation of acetylene from gas mixtures |
US2270852A (en) * | 1939-03-24 | 1942-01-27 | British Oxygen Co Ltd | Separating of gas mixtures |
US2321666A (en) * | 1940-02-08 | 1943-06-15 | Carbide & Carbon Chem Corp | Process for gas separation |
US2775103A (en) * | 1954-12-23 | 1956-12-25 | Phillips Petroleum Co | Hydrocarbon separation |
US3062015A (en) * | 1957-03-08 | 1962-11-06 | Air Prod & Chem | Separation of gaseous mixtures |
US3023842A (en) * | 1958-08-05 | 1962-03-06 | Kellogg M W Co | Acetylene purification |
DE1568160A1 (de) * | 1966-08-12 | 1970-01-02 | Basf Ag | Verfahren zur gemeinsamen Abtrennung von Acetylen und AEthylen aus Spaltgasen |
-
1968
- 1968-05-16 DE DE1768460A patent/DE1768460C2/de not_active Expired
-
1969
- 1969-05-08 SE SE06566/69A patent/SE339070B/xx unknown
- 1969-05-12 CH CH724269A patent/CH525697A/de not_active IP Right Cessation
- 1969-05-14 FR FR6915657A patent/FR2008664A7/fr not_active Expired
- 1969-05-14 NL NL6907467A patent/NL6907467A/xx unknown
- 1969-05-15 GB GB1257372D patent/GB1257372A/en not_active Expired
- 1969-05-16 ES ES367286A patent/ES367286A1/es not_active Expired
- 1969-05-16 AT AT470569A patent/AT284070B/de not_active IP Right Cessation
- 1969-05-16 US US825323A patent/US3635038A/en not_active Expired - Lifetime
- 1969-05-16 BE BE733158D patent/BE733158A/xx unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2471568A1 (fr) * | 1979-12-06 | 1981-06-19 | Polysar Ltd | Procede de recuperation d'hydrocarbures d'un gaz residuaire |
GB2146751A (en) * | 1983-09-20 | 1985-04-24 | Petrocarbon Dev Ltd | Separation of hydrocarbon mixtures |
US4622053A (en) * | 1983-09-20 | 1986-11-11 | Petrocarbon Developments Limited | Separation of hydrocarbon mixtures |
US5030339A (en) * | 1988-10-21 | 1991-07-09 | Costain Engineering Limited | Separation of gas and oil mixtures |
Also Published As
Publication number | Publication date |
---|---|
US3635038A (en) | 1972-01-18 |
SE339070B (enrdf_load_stackoverflow) | 1971-09-27 |
ES367286A1 (es) | 1971-04-01 |
CH525697A (de) | 1972-07-31 |
DE1768460B1 (de) | 1972-05-31 |
AT284070B (de) | 1970-08-25 |
FR2008664A7 (enrdf_load_stackoverflow) | 1970-01-23 |
DE1768460C2 (de) | 1973-01-04 |
BE733158A (enrdf_load_stackoverflow) | 1969-11-13 |
NL6907467A (enrdf_load_stackoverflow) | 1969-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |