GB1478621A - Production of unsaturated nitriles using catalysts promoted with various metals - Google Patents
Production of unsaturated nitriles using catalysts promoted with various metalsInfo
- Publication number
- GB1478621A GB1478621A GB24600/74A GB2460074A GB1478621A GB 1478621 A GB1478621 A GB 1478621A GB 24600/74 A GB24600/74 A GB 24600/74A GB 2460074 A GB2460074 A GB 2460074A GB 1478621 A GB1478621 A GB 1478621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isobutylene
- ammonia
- propylene
- mixtures
- production
- 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
- 239000003054 catalyst Substances 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 title 1
- 239000002184 metal Substances 0.000 title 1
- 150000002739 metals Chemical class 0.000 title 1
- 150000002825 nitriles Chemical class 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 6
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 abstract 3
- 229910021529 ammonia Inorganic materials 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229910052727 yttrium Inorganic materials 0.000 abstract 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 abstract 1
- 229910052776 Thorium Inorganic materials 0.000 abstract 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 229910052787 antimony Inorganic materials 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910052790 beryllium Inorganic materials 0.000 abstract 1
- 229910052796 boron Inorganic materials 0.000 abstract 1
- 229910052793 cadmium Inorganic materials 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- 229910052733 gallium Inorganic materials 0.000 abstract 1
- 229910052732 germanium Inorganic materials 0.000 abstract 1
- 229910052738 indium Inorganic materials 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 229910052706 scandium Inorganic materials 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 229910052718 tin Inorganic materials 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8872—Alkali or alkaline earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/881—Molybdenum and iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8875—Germanium, tin or lead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8876—Arsenic, antimony or bismuth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/8993—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with chromium, molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/24—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons
- C07C253/26—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Abstract
1478621 (Meth)acrylonitrile STANDARD OIL CO 4 June 1974 [4 June 1973 19 July 1973 4 Jan 1974] 24600/74 Heading C2C [Also in Division B1] Acrylonitrile or methacrylonitrile are produced by the reaction of propylene or isobutylene with molecular oxygen and ammonia at 200-600 C. in the presence of a catalyst of the empirical formula wherein: X is Ge, Sn, Cu, Ag, Cr, Ru, W, Be, B, Ga, In, Mn, Sb, Th, Zr, Y or mixtures thereof; A is alkali metal, alkaline earth metal, Sc, Y, rare earth metal, Nb, Ta, P, As or mixtures thereof and is different from " X " or " C "; C is Ni, Co, Mg, Zn, Cd, Ca or mixtures thereof; a is 0.01 to 4; 6 is 0 to 4; c and d are 0À01 to 12; e is 0.01 to 6; and x is a number to satisfy valency requirements. The examples describe the ammoxidation of propylene using a feed of propylene / ammonia / oxygen / nitrogen / steam molar ratio 1.8/2.2/3.6/2.4/6, a contact time of 3 seconds, a WWH of 0-10 and a temperature of 420 C., and the ammoxidation of isobutylene with a feed of isobutylene/ammonia/air/steam of 1/1.2 or 1.5/11/4 at a temperature of 400 C.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36704273A | 1973-06-04 | 1973-06-04 | |
| US38052773A | 1973-07-19 | 1973-07-19 | |
| US05/430,964 US4139552A (en) | 1974-01-04 | 1974-01-04 | Production of unsaturated nitriles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1478621A true GB1478621A (en) | 1977-07-06 |
Family
ID=27408795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24600/74A Expired GB1478621A (en) | 1973-06-04 | 1974-06-04 | Production of unsaturated nitriles using catalysts promoted with various metals |
Country Status (23)
| Country | Link |
|---|---|
| JP (1) | JPS5950667B2 (en) |
| AR (1) | AR201590A1 (en) |
| BE (1) | BE815893A (en) |
| BG (1) | BG24943A3 (en) |
| BR (1) | BR7404534D0 (en) |
| CH (1) | CH593242A5 (en) |
| CS (1) | CS188923B2 (en) |
| DD (1) | DD115115A5 (en) |
| DE (1) | DE2424934A1 (en) |
| DK (1) | DK295474A (en) |
| EG (1) | EG11454A (en) |
| ES (1) | ES426907A1 (en) |
| FI (1) | FI168274A (en) |
| FR (1) | FR2231669B1 (en) |
| GB (1) | GB1478621A (en) |
| HU (1) | HU168551B (en) |
| IE (1) | IE39402B1 (en) |
| IL (1) | IL44916A (en) |
| IT (1) | IT1017645B (en) |
| MY (1) | MY7800272A (en) |
| NL (1) | NL7407314A (en) |
| NO (1) | NO143740C (en) |
| SE (1) | SE420496B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0002626A2 (en) * | 1977-12-20 | 1979-06-27 | The Standard Oil Company | Ammoxidation of olefins with novel antimonate catalysts |
| EP0018103A1 (en) * | 1979-04-18 | 1980-10-29 | Ube Industries, Ltd. | Ammoxidation catalyst for the production of acrylonitrile from propylene and process for producing the same |
| US4264476A (en) | 1978-10-20 | 1981-04-28 | Ube Industries, Inc. | Catalyst for producing acrylonitrile in a fluidized bed reactor |
| EP0086292A1 (en) * | 1982-02-15 | 1983-08-24 | The Standard Oil Company | Production of catalysts by impregnation and use thereof in oxidation type reactions |
| EP0337779A2 (en) * | 1988-04-15 | 1989-10-18 | Nitto Chemical Industry Co., Ltd. | Process for the production of acrylonitrile |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5245692B2 (en) * | 1973-10-16 | 1977-11-17 | ||
| JPS5432766B2 (en) * | 1974-06-04 | 1979-10-16 | ||
| GB1523772A (en) * | 1974-07-22 | 1978-09-06 | Standard Oil Co | Oxidation catalysts |
| JPS5163112A (en) * | 1974-11-27 | 1976-06-01 | Nippon Kayaku Kk | Metakuroreinno seizoho |
| JPS5231026A (en) * | 1975-09-05 | 1977-03-09 | Ube Ind Ltd | Process for preparation of acrylonitrile |
| IL55073A (en) * | 1977-07-28 | 1982-01-31 | Standard Oil Co | Catalysts for the oxidation and ammoxidation of olefins |
| JPS584691B2 (en) * | 1977-11-07 | 1983-01-27 | 宇部興産株式会社 | Method for producing methacrolein |
| JPS5538330A (en) * | 1978-09-13 | 1980-03-17 | Ube Ind Ltd | Preparation of acrylonitrile |
| DE3521766A1 (en) * | 1985-06-19 | 1987-01-02 | Basf Ag | HONEYCOMB CATALYST, ITS PRODUCTION AND USE |
| JPH0437710Y2 (en) * | 1987-03-20 | 1992-09-04 | ||
| JP2520279B2 (en) * | 1988-03-03 | 1996-07-31 | 日東化学工業株式会社 | Method for producing acrylonitrile |
| WO1997033863A1 (en) * | 1996-03-12 | 1997-09-18 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for preparing unsaturated nitrile |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS494452B1 (en) * | 1970-09-18 | 1974-02-01 | ||
| NL175175C (en) * | 1970-10-30 | 1984-10-01 | Standard Oil Co Ohio | PROCESS FOR CONVERTING PROPENE AND / OR ISOBUTENE WITH A MOLECULAR OXYGEN-CONTAINING GAS AND AMMONIA IN THE PRESENCE OF A CATALYST. |
| CA975382A (en) * | 1971-02-04 | 1975-09-30 | Arthur F. Miller | Process for the manufacture of acrylonitrile and methacrylonitrile |
| CA1004232A (en) * | 1971-12-30 | 1977-01-25 | The Standard Oil Company | Coproduction of methacrylonitrile and butadiene |
-
1974
- 1974-05-22 DE DE19742424934 patent/DE2424934A1/en not_active Withdrawn
- 1974-05-24 SE SE7406934A patent/SE420496B/en not_active IP Right Cessation
- 1974-05-29 IL IL44916A patent/IL44916A/en unknown
- 1974-05-29 DD DD178842A patent/DD115115A5/xx unknown
- 1974-05-29 NO NO741957A patent/NO143740C/en unknown
- 1974-05-30 NL NL7407314A patent/NL7407314A/xx not_active Application Discontinuation
- 1974-05-31 DK DK295474*A patent/DK295474A/da not_active Application Discontinuation
- 1974-05-31 JP JP49061749A patent/JPS5950667B2/en not_active Expired
- 1974-05-31 IE IE1149/74A patent/IE39402B1/en unknown
- 1974-06-02 EG EG200/74A patent/EG11454A/en active
- 1974-06-03 ES ES426907A patent/ES426907A1/en not_active Expired
- 1974-06-03 BR BR4534/74A patent/BR7404534D0/en unknown
- 1974-06-03 IT IT23520/74A patent/IT1017645B/en active
- 1974-06-03 FI FI1682/74A patent/FI168274A/fi unknown
- 1974-06-04 CS CS743967A patent/CS188923B2/en unknown
- 1974-06-04 BE BE145057A patent/BE815893A/en not_active IP Right Cessation
- 1974-06-04 HU HUSA2654A patent/HU168551B/hu unknown
- 1974-06-04 BG BG7400026874A patent/BG24943A3/en unknown
- 1974-06-04 AR AR254060A patent/AR201590A1/en active
- 1974-06-04 GB GB24600/74A patent/GB1478621A/en not_active Expired
- 1974-06-04 CH CH760374A patent/CH593242A5/xx not_active IP Right Cessation
- 1974-06-04 FR FR7419169A patent/FR2231669B1/fr not_active Expired
-
1978
- 1978-12-30 MY MY272/78A patent/MY7800272A/en unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0002626A2 (en) * | 1977-12-20 | 1979-06-27 | The Standard Oil Company | Ammoxidation of olefins with novel antimonate catalysts |
| EP0002626A3 (en) * | 1977-12-20 | 1979-08-08 | The Standard Oil Company | Ammoxidation of olefins with novel antimonate catalysts |
| US4264476A (en) | 1978-10-20 | 1981-04-28 | Ube Industries, Inc. | Catalyst for producing acrylonitrile in a fluidized bed reactor |
| EP0018103A1 (en) * | 1979-04-18 | 1980-10-29 | Ube Industries, Ltd. | Ammoxidation catalyst for the production of acrylonitrile from propylene and process for producing the same |
| EP0086292A1 (en) * | 1982-02-15 | 1983-08-24 | The Standard Oil Company | Production of catalysts by impregnation and use thereof in oxidation type reactions |
| EP0337779A2 (en) * | 1988-04-15 | 1989-10-18 | Nitto Chemical Industry Co., Ltd. | Process for the production of acrylonitrile |
| EP0337779A3 (en) * | 1988-04-15 | 1990-07-04 | Nitto Chemical Industry Co., Ltd. | Process for the production of acrylonitrile |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6976874A (en) | 1975-12-04 |
| IE39402B1 (en) | 1978-09-27 |
| NL7407314A (en) | 1974-12-06 |
| IE39402L (en) | 1974-12-04 |
| EG11454A (en) | 1977-09-30 |
| SE7406934L (en) | 1974-12-05 |
| HU168551B (en) | 1976-05-28 |
| CH593242A5 (en) | 1977-11-30 |
| AR201590A1 (en) | 1975-03-31 |
| JPS5025528A (en) | 1975-03-18 |
| DK295474A (en) | 1975-02-03 |
| DD115115A5 (en) | 1975-09-12 |
| SE420496B (en) | 1981-10-12 |
| ES426907A1 (en) | 1976-09-01 |
| BE815893A (en) | 1974-12-04 |
| NO143740C (en) | 1981-04-08 |
| MY7800272A (en) | 1978-12-31 |
| NO741957L (en) | 1974-12-05 |
| IL44916A (en) | 1978-01-31 |
| IL44916A0 (en) | 1974-07-31 |
| DE2424934A1 (en) | 1975-01-02 |
| BG24943A3 (en) | 1978-06-15 |
| FR2231669A1 (en) | 1974-12-27 |
| FR2231669B1 (en) | 1980-04-11 |
| CS188923B2 (en) | 1979-03-30 |
| NO143740B (en) | 1980-12-29 |
| FI168274A (en) | 1974-12-05 |
| JPS5950667B2 (en) | 1984-12-10 |
| BR7404534D0 (en) | 1975-09-30 |
| IT1017645B (en) | 1977-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 414F | Notice of opposition given (sect. 14/1949) | ||
| 414O | Opposition not proceeded with (sect. 14/1949) | ||
| PS | Patent sealed [section 19, patents act 1949] | ||
| 49R | Reference inserted (sect. 9/1949) | ||
| SPA | Amended specification published | ||
| PCNP | Patent ceased through non-payment of renewal fee |