FI58360C - Foerfarande foer delignifiering av lignocellulosahaltigt material med hjaelp av syreinnehaollande gas och apparatur foer utfoerande av detta foerfarande - Google Patents
Foerfarande foer delignifiering av lignocellulosahaltigt material med hjaelp av syreinnehaollande gas och apparatur foer utfoerande av detta foerfarande Download PDFInfo
- Publication number
- FI58360C FI58360C FI751509A FI751509A FI58360C FI 58360 C FI58360 C FI 58360C FI 751509 A FI751509 A FI 751509A FI 751509 A FI751509 A FI 751509A FI 58360 C FI58360 C FI 58360C
- Authority
- FI
- Finland
- Prior art keywords
- gas
- reactor
- carbon monoxide
- oxygen
- foerfarande
- Prior art date
Links
- 239000000463 material Substances 0.000 title description 8
- 239000007789 gas Substances 0.000 claims description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 47
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 47
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 239000012978 lignocellulosic material Substances 0.000 claims description 12
- 239000001569 carbon dioxide Substances 0.000 claims description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910002090 carbon oxide Inorganic materials 0.000 claims 6
- 238000000926 separation method Methods 0.000 claims 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 32
- 229910001882 dioxygen Inorganic materials 0.000 description 24
- 229920005610 lignin Polymers 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000011282 treatment Methods 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000002474 experimental method Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000004880 explosion Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 238000007792 addition Methods 0.000 description 4
- 238000004061 bleaching Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 150000002681 magnesium compounds Chemical class 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 150000002697 manganese compounds Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 241000779819 Syncarpia glomulifera Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001720 carbohydrates Chemical group 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 150000002506 iron compounds Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000001739 pinus spp. Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 229940036248 turpentine Drugs 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1068—Bleaching ; Apparatus therefor with O2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Carbon And Carbon Compounds (AREA)
- Compounds Of Unknown Constitution (AREA)
- Fertilizers (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Catalysts (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7407885 | 1974-06-14 | ||
| SE7407885A SE382474C (sv) | 1974-06-14 | 1974-06-14 | Forfarande och anordning for syrgasdelignifiering av lignocellulosahaltigt material |
| SE7500686 | 1975-01-22 | ||
| SE7500686A SE422606B (sv) | 1975-01-22 | 1975-01-22 | Forfarande for syragasdelignifiering av lignocellulosahaltigt material |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI751509A7 FI751509A7 (en, 2012) | 1975-12-15 |
| FI58360B FI58360B (fi) | 1980-09-30 |
| FI58360C true FI58360C (fi) | 1981-01-12 |
Family
ID=26656497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI751509A FI58360C (fi) | 1974-06-14 | 1975-05-23 | Foerfarande foer delignifiering av lignocellulosahaltigt material med hjaelp av syreinnehaollande gas och apparatur foer utfoerande av detta foerfarande |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4050981A (en, 2012) |
| JP (1) | JPS5214323B2 (en, 2012) |
| BR (1) | BR7503748A (en, 2012) |
| CA (1) | CA1036759A (en, 2012) |
| CH (1) | CH611956A5 (en, 2012) |
| DE (1) | DE2523191C3 (en, 2012) |
| FI (1) | FI58360C (en, 2012) |
| FR (1) | FR2274728A1 (en, 2012) |
| GB (1) | GB1505529A (en, 2012) |
| IT (1) | IT1036296B (en, 2012) |
| NO (1) | NO145922C (en, 2012) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS528103A (en) * | 1975-07-10 | 1977-01-21 | Gadelius Co Ltd | Process for removing explosive gas from lignin separating tower through oxygenation by pulp manufacture |
| SE416481B (sv) * | 1977-05-02 | 1981-01-05 | Mo Och Domsjoe Ab | Fofarande och anordning for behandling av vedflis for avlegsnande av tungmetaller och harts |
| SE417114B (sv) * | 1977-07-25 | 1981-02-23 | Mo Och Domsjoe Ab | Forfarande for forebyggande av inkrustbildning i cellulosafabriker |
| SE434284B (sv) * | 1980-05-07 | 1984-07-16 | Mo Och Domsjoe Ab | Forfarande vid syrgasdelignifiering av kemiskt uppsluten cellulosamassa varvid aromatiska diaminer tillfores |
| US4384920A (en) * | 1981-04-06 | 1983-05-24 | The Black Clawson Company | Method and apparatus for oxygen delignification |
| US4622101A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Method of oxygen bleaching with ferricyanide lignocellulosic material |
| US4622100A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Process for the delignification of lignocellulosic material with oxygen, ferricyanide, and a protector |
| US4826567A (en) * | 1985-08-05 | 1989-05-02 | Interox (Societe Anonyme) | Process for the delignification of cellulosic substances by pretreating with a complexing agent followed by hydrogen peroxide |
| US4826568A (en) * | 1985-08-05 | 1989-05-02 | Interox (Societe Anonyme) | Process for delignification of cellulosic substances by pretreating with a complexing agent followed by peroxide prior to kraft digestion |
| US4946555A (en) * | 1989-01-19 | 1990-08-07 | Canadian Liquid Air Ltd./Air Liquide Canada | Apparatus and method for measuring vent gas flow rates and parameters in pulp and paper processing |
| US4946556A (en) * | 1989-04-25 | 1990-08-07 | Kamyr, Inc. | Method of oxygen delignifying wood pulp with between stage washing |
| AT395180B (de) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung |
| US5079209A (en) * | 1990-03-07 | 1992-01-07 | United Technologies Corporation | Preparation of high capacity unsupported regenerable co2 sorbent |
| US5454968A (en) * | 1990-11-08 | 1995-10-03 | United Technologies Corporation | Flat sheet CO2 sorbent |
| SE9401771D0 (sv) * | 1994-05-24 | 1994-05-24 | Hans Olof Samuelson | Process for removal of metal compounds in lignocellulosic pulp |
| FI122654B (fi) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Menetelmä paperisellumassan valmistamiseksi |
| US20020129911A1 (en) * | 2000-10-16 | 2002-09-19 | Marcoccia Bruno S. | Process and configuration for providing external upflow/internal downflow in a continuous digester |
| US20030000661A1 (en) * | 2001-06-22 | 2003-01-02 | Henricson Kaj O. | Removal of water-soluble compounds from wood chips prior to cooking |
| EP2212467B1 (en) * | 2007-11-01 | 2014-06-11 | Eau-Viron Incorporated | Methods and apparatus for hydrolyzing cellulosic material |
| WO2012034087A1 (en) * | 2010-09-10 | 2012-03-15 | Synthetic Genomics, Inc. | Solubilization of coal or lignocellulose biomass |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1529919A (en) * | 1922-03-06 | 1925-03-17 | Stebbins Engineering And Mfg C | Pulp-bleaching method and apparatus |
| US1790260A (en) * | 1927-10-27 | 1931-01-27 | Oxford Paper Co | Method of manufacturing chemical pulp or cellulose |
| US2811518A (en) * | 1955-06-07 | 1957-10-29 | Rayonier Inc | Alkaline refining of wood pulp |
| US3525665A (en) * | 1965-10-22 | 1970-08-25 | Lummus Co | Method of transferring impregnated wood chips from an impregnating vessel to a digester |
| FR1601408A (en, 2012) * | 1967-06-20 | 1970-08-24 | ||
| US3703435A (en) * | 1967-11-09 | 1972-11-21 | Sunds Ab | Method for finely disintegrating pulp,preferentially cellulose pulp,in connection with the bleaching thereof with gaseous bleaching agent |
| OA03094A (fr) * | 1968-07-11 | 1970-12-15 | P P I South African Pulp And P | Perfectionnements à la délignification et au blanchiment des pâtes de cellulose avec l'oxygène gazeux. |
| SE335053B (en, 2012) * | 1969-05-13 | 1971-05-10 | Mo Och Domsjoe Ab | |
| CA918978A (en) * | 1970-01-08 | 1973-01-16 | G. Jamieson Allan | Oxygen bleaching |
| SE355614B (en, 2012) * | 1970-05-13 | 1973-04-30 | Mo Och Domsjoe Ab | |
| SE343092B (en, 2012) * | 1970-06-22 | 1972-02-28 | Mo Och Domsjoe Ab | |
| SU372305A1 (ru) | 1971-02-22 | 1973-03-01 | Всесоюзный научно исследовательский институт целлюлозно бумажной промышленности | Способ получения целлюлозы |
| US3790637A (en) * | 1972-05-04 | 1974-02-05 | American Cyanamid Co | Process for the manufacture of vanillin from sulfite waste liquor |
-
1975
- 1975-05-23 GB GB22637/75A patent/GB1505529A/en not_active Expired
- 1975-05-23 FI FI751509A patent/FI58360C/fi not_active IP Right Cessation
- 1975-05-26 DE DE2523191A patent/DE2523191C3/de not_active Expired
- 1975-06-10 JP JP50070099A patent/JPS5214323B2/ja not_active Expired
- 1975-06-10 CA CA228,982A patent/CA1036759A/en not_active Expired
- 1975-06-11 US US05/586,114 patent/US4050981A/en not_active Expired - Lifetime
- 1975-06-12 FR FR7518413A patent/FR2274728A1/fr active Granted
- 1975-06-13 IT IT68532/75A patent/IT1036296B/it active
- 1975-06-13 NO NO752103A patent/NO145922C/no unknown
- 1975-06-13 BR BR4812/75D patent/BR7503748A/pt unknown
- 1975-06-13 CH CH770475A patent/CH611956A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US4050981A (en) | 1977-09-27 |
| DE2523191C3 (de) | 1985-01-03 |
| CH611956A5 (en, 2012) | 1979-06-29 |
| BR7503748A (pt) | 1976-07-06 |
| JPS5214323B2 (en, 2012) | 1977-04-21 |
| DE2523191B2 (de) | 1976-11-25 |
| GB1505529A (en) | 1978-03-30 |
| FI751509A7 (en, 2012) | 1975-12-15 |
| NO752103L (en, 2012) | 1975-12-16 |
| DE2523191A1 (de) | 1975-12-18 |
| FR2274728B1 (en, 2012) | 1977-12-09 |
| NO145922B (no) | 1982-03-15 |
| FI58360B (fi) | 1980-09-30 |
| FR2274728A1 (fr) | 1976-01-09 |
| IT1036296B (it) | 1979-10-30 |
| JPS5188701A (en, 2012) | 1976-08-03 |
| NO145922C (no) | 1982-06-23 |
| CA1036759A (en) | 1978-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed |
Owner name: MO OCH DOMSJOE AB |