DE1809874B2 - Vorrichtung zur trockenen Destillation von bituminösen oder ölhaltigen, feinkörnigen Materialien zwecks Gewinnung von flüssigen Kohlenwasserstoffen - Google Patents
Vorrichtung zur trockenen Destillation von bituminösen oder ölhaltigen, feinkörnigen Materialien zwecks Gewinnung von flüssigen KohlenwasserstoffenInfo
- Publication number
- DE1809874B2 DE1809874B2 DE1809874A DE1809874A DE1809874B2 DE 1809874 B2 DE1809874 B2 DE 1809874B2 DE 1809874 A DE1809874 A DE 1809874A DE 1809874 A DE1809874 A DE 1809874A DE 1809874 B2 DE1809874 B2 DE 1809874B2
- Authority
- DE
- Germany
- Prior art keywords
- oil
- distillation
- heat transfer
- mixer
- transfer medium
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims description 41
- 238000000197 pyrolysis Methods 0.000 title claims description 6
- 229930195733 hydrocarbon Natural products 0.000 title description 10
- 150000002430 hydrocarbons Chemical class 0.000 title description 10
- 239000007788 liquid Substances 0.000 title description 4
- 239000007789 gas Substances 0.000 claims description 75
- 238000004821 distillation Methods 0.000 claims description 50
- 238000002156 mixing Methods 0.000 claims description 36
- 239000000428 dust Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 15
- 239000004058 oil shale Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 239000003027 oil sand Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003077 lignite Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 38
- 239000000203 mixture Substances 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000000969 carrier Substances 0.000 description 10
- 239000000567 combustion gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000571 coke Substances 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000003502 gasoline Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000010517 secondary reaction Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000010763 heavy fuel oil Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WZECUPJJEIXUKY-UHFFFAOYSA-N [O-2].[O-2].[O-2].[U+6] Chemical compound [O-2].[O-2].[O-2].[U+6] WZECUPJJEIXUKY-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229910000439 uranium oxide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/16—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with moving solid heat-carriers in divided form
- C10B49/20—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with moving solid heat-carriers in divided form in dispersed form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/02—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1809874A DE1809874B2 (de) | 1968-11-20 | 1968-11-20 | Vorrichtung zur trockenen Destillation von bituminösen oder ölhaltigen, feinkörnigen Materialien zwecks Gewinnung von flüssigen Kohlenwasserstoffen |
US877996A US3655518A (en) | 1968-11-20 | 1969-11-19 | Retort system for oil shales and the like |
CA067913A CA920080A (en) | 1968-11-20 | 1969-11-19 | Retort system for oil shales and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1809874A DE1809874B2 (de) | 1968-11-20 | 1968-11-20 | Vorrichtung zur trockenen Destillation von bituminösen oder ölhaltigen, feinkörnigen Materialien zwecks Gewinnung von flüssigen Kohlenwasserstoffen |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1809874A1 DE1809874A1 (de) | 1970-06-04 |
DE1809874B2 true DE1809874B2 (de) | 1974-10-31 |
DE1809874C3 DE1809874C3 (enrdf_load_stackoverflow) | 1975-06-19 |
Family
ID=5713797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1809874A Granted DE1809874B2 (de) | 1968-11-20 | 1968-11-20 | Vorrichtung zur trockenen Destillation von bituminösen oder ölhaltigen, feinkörnigen Materialien zwecks Gewinnung von flüssigen Kohlenwasserstoffen |
Country Status (3)
Country | Link |
---|---|
US (1) | US3655518A (enrdf_load_stackoverflow) |
CA (1) | CA920080A (enrdf_load_stackoverflow) |
DE (1) | DE1809874B2 (enrdf_load_stackoverflow) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2537732A1 (de) * | 1975-08-25 | 1977-03-10 | Gni Energetichesky Inst | Verfahren zur thermischen verarbeitung von festen bituminoesen werkstoffen und einrichtung zu dessen verwirklichung |
DE10253678A1 (de) * | 2002-11-18 | 2004-05-27 | Otto Dipl.-Ing. Heinemann | Verfahren und Vorrichtung zur Gewinnung von Kohlenwasserstoffen |
Families Citing this family (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3962043A (en) * | 1972-02-23 | 1976-06-08 | Metallgesellschaft Aktiengesellschaft | Process for producing fine-grained coke by degasification of coal |
US3926576A (en) * | 1972-05-12 | 1975-12-16 | Bergwerksverband Gmbh | Process for producing hot briquettes |
US4334959A (en) * | 1974-03-07 | 1982-06-15 | Occidental Petroleum Corporation | Mixing method and apparatus |
ZA751163B (en) * | 1974-03-07 | 1976-01-28 | Occidental Petroleum Corp | Mixing particulate materials |
DE2508707C2 (de) * | 1975-02-28 | 1982-09-23 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zum Behandeln von bei der Schwelung von Ölschiefer entstehenden Dämpfen |
DE2527852A1 (de) * | 1975-06-23 | 1977-01-13 | Metallgesellschaft Ag | Verfahren zum entgasen feinkoerniger brennstoffe |
US4088541A (en) * | 1975-08-11 | 1978-05-09 | Occidental Petroleum Corporation | Apparatus for pyrolyzing organic solid waste |
US4077847A (en) * | 1975-08-11 | 1978-03-07 | Occidental Petroleum Corporation | Solid waste disposal system |
US4211606A (en) * | 1975-08-19 | 1980-07-08 | Chikul Olga S | Method for thermal processing bitumen-containing materials and device for realization of same |
US4070250A (en) * | 1976-06-25 | 1978-01-24 | Occidental Petroleum Corporation | Pyrolysis of carbonaceous materials in a double helix cyclone |
US4141794A (en) * | 1976-06-25 | 1979-02-27 | Occidental Petroleum Corporation | Grid-wall pyrolysis reactor |
US4102773A (en) * | 1976-06-25 | 1978-07-25 | Occidental Petroleum Corporation | Pyrolysis with cyclone burner |
GB1583170A (en) * | 1976-06-25 | 1981-01-21 | Occidental Petroleum Corp | Pyrolysis of agglomerative coals |
US4145274A (en) * | 1976-06-25 | 1979-03-20 | Occidental Petroleum Corporation | Pyrolysis with staged recovery |
US4056461A (en) * | 1976-06-25 | 1977-11-01 | Chevron Research Company | Retorting process utilizing a flexible, helical shaped conveyor |
US4085030A (en) * | 1976-06-25 | 1978-04-18 | Occidental Petroleum Corporation | Pyrolysis of carbonaceous materials with solvent quench recovery |
US4078973A (en) * | 1976-07-12 | 1978-03-14 | Occidental Petroleum Corporation | Loop pyrolysis process for organic solid wastes |
US4147593A (en) * | 1976-07-21 | 1979-04-03 | Occidental Petroleum Corporation | Flash pyrolysis of organic solid waste employing ash recycle |
US4087347A (en) * | 1976-09-20 | 1978-05-02 | Chevron Research Company | Shale retorting process |
US4210491A (en) * | 1976-11-01 | 1980-07-01 | Tosco Corporation | Method and apparatus for retorting a substance containing organic matter |
GB1597517A (en) * | 1977-01-07 | 1981-09-09 | Arcalon Gen Petroleum | Process and apparatus for the pyrolysis of refuse |
US4366043A (en) * | 1978-08-02 | 1982-12-28 | Chukhanov Zinovy F | Method and apparatus for heat processing pulverized brown coal |
US4243489A (en) * | 1978-11-13 | 1981-01-06 | Occidental Petroleum Corp. | Pyrolysis reactor and fluidized bed combustion chamber |
US4225415A (en) * | 1979-08-10 | 1980-09-30 | Occidental Petroleum Corporation | Recovering hydrocarbons from hydrocarbon-containing vapors |
DE2937065C2 (de) * | 1979-09-13 | 1983-12-29 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zum Behandeln von Schwelrückstand aus der trockenen Destillation von Ölschiefer oder dgl. |
DE2946102A1 (de) * | 1979-11-15 | 1981-05-27 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren und vorrichtung zum schwelen von feinkoernigem schwelgut mit heissem, feinkoernigem waermetraegermaterial |
DE3023670C2 (de) * | 1980-06-25 | 1982-12-23 | Veba Oel Entwicklungsgesellschaft mbH, 4660 Gelsenkirchen-Buer | Verfahren und Vorrichtung zum Schwelen von Ölschiefer |
US4377465A (en) * | 1980-11-19 | 1983-03-22 | Standard Oil Company (Indiana) | Oil shale retorting method and apparatus |
US4396490A (en) * | 1980-11-19 | 1983-08-02 | Standard Oil Company (Indiana) | Oil shale retorting method and apparatus |
US4415432A (en) * | 1980-11-19 | 1983-11-15 | Standard Oil Company (Indiana) | Hydrocarbon recovery method and apparatus |
US4336126A (en) * | 1981-03-23 | 1982-06-22 | Chevron Research Company | Process for burning retorted oil shale and improved combustor |
US4336127A (en) * | 1981-05-26 | 1982-06-22 | Chevron Research Company | Staged burning of retorted carbon-containing solids |
JPS604864B2 (ja) | 1981-03-27 | 1985-02-07 | 日本鋼管株式会社 | オイルシエ−ルの乾溜方法 |
US4377466A (en) * | 1981-04-27 | 1983-03-22 | Chevron Research Company | Process for staged combustion of retorted carbon containing solids |
US4402823A (en) * | 1981-07-29 | 1983-09-06 | Chevron Research Company | Supplemental pyrolysis and fines removal in a process for pyrolyzing a hydrocarbon-containing solid |
US4544478A (en) * | 1982-09-03 | 1985-10-01 | Chevron Research Company | Process for pyrolyzing hydrocarbonaceous solids to recover volatile hydrocarbons |
DE3305994A1 (de) * | 1983-02-22 | 1984-08-23 | Metallgesellschaft Ag | Verfahren zur trockenen destillation von bitumioesen oder oelhaltigen feststoffen |
DE3323770A1 (de) * | 1983-07-01 | 1985-01-03 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zum trocknen und erhitzen von oelhaltigen feststoffen |
US4495059A (en) * | 1983-08-12 | 1985-01-22 | Chevron Research Company | Steam recycle used as stripping gas in oil shale retorting |
US4536277A (en) * | 1984-02-24 | 1985-08-20 | Standard Oil Company (Indiana) | Shale oil stabilization with a hydrogen donor quench and a hydrogen transfer catalyst |
US4548702A (en) * | 1984-02-24 | 1985-10-22 | Standard Oil Company | Shale oil stabilization with a hydroprocessor |
US4536278A (en) * | 1984-02-24 | 1985-08-20 | Standard Oil Company (Indiana) | Shale oil stabilization with a hydrogen donor quench |
US4760856A (en) * | 1984-04-12 | 1988-08-02 | Fuller Company | Method and apparatus for conditioning fly ash |
DE4321680C1 (de) * | 1993-06-30 | 1994-04-14 | Metallgesellschaft Ag | Verfahren zum Trocknen eines wasserhaltigen Brennstoffs durch direkten Kontakt mit heißem, körnigem Feststoffrückstand |
DE19512850A1 (de) * | 1995-04-06 | 1996-10-10 | Veba Oel Technologie & Automatisierung Gmbh | Verfahren zur Schwelgasentstaubung |
US6203765B1 (en) | 1996-09-23 | 2001-03-20 | Alberta Oil Sands Technology & Research Authority | Thermal apparatus and process for removing contaminants from oil |
DE19649532A1 (de) * | 1996-11-29 | 1998-06-04 | Gutehoffnungshuette Man | Synthesegas-Wärmetauscher-Anlage |
NL1020861C2 (nl) | 2002-06-14 | 2003-12-16 | Tno Biomass Technology Group B | Werkwijze voor het pyrolyseren van een pyrolyseerbare massa. |
US20080179228A1 (en) * | 2007-01-30 | 2008-07-31 | Vankouwenberg Raymond E | Wastewater evaporator with waste oil burner |
US20090114567A1 (en) * | 2007-11-07 | 2009-05-07 | Maxwell James F | Cracking hydrocarbonaceous materials with heating bodies |
US10436525B2 (en) * | 2016-05-12 | 2019-10-08 | Golden Renewable Energy, LLC | Cyclonic cooling system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3251751A (en) * | 1966-05-17 | Process for carbonizing coal | ||
US2788314A (en) * | 1949-08-03 | 1957-04-09 | Metallgesellschaft Ag | Process for the gasification of fine grained or pulverulent fuels |
US2983653A (en) * | 1953-12-04 | 1961-05-09 | Metallgesellschaft Ag | Apparatus for degasifying finely divided fuels |
US3140240A (en) * | 1960-07-21 | 1964-07-07 | Consolidation Coal Co | Process for carbonizing coal |
US3281349A (en) * | 1963-07-25 | 1966-10-25 | Mobil Oil Corp | Separating and cracking of shale oil from oil shale |
US3501394A (en) * | 1967-04-17 | 1970-03-17 | Mobil Oil Corp | Gas lift retorting process for obtaining oil from fine particles containing hydrocarbonaceous material |
BE701296A (enrdf_load_stackoverflow) * | 1967-07-12 | 1967-12-18 |
-
1968
- 1968-11-20 DE DE1809874A patent/DE1809874B2/de active Granted
-
1969
- 1969-11-19 CA CA067913A patent/CA920080A/en not_active Expired
- 1969-11-19 US US877996A patent/US3655518A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2537732A1 (de) * | 1975-08-25 | 1977-03-10 | Gni Energetichesky Inst | Verfahren zur thermischen verarbeitung von festen bituminoesen werkstoffen und einrichtung zu dessen verwirklichung |
DE10253678A1 (de) * | 2002-11-18 | 2004-05-27 | Otto Dipl.-Ing. Heinemann | Verfahren und Vorrichtung zur Gewinnung von Kohlenwasserstoffen |
Also Published As
Publication number | Publication date |
---|---|
DE1809874A1 (de) | 1970-06-04 |
DE1809874C3 (enrdf_load_stackoverflow) | 1975-06-19 |
US3655518A (en) | 1972-04-11 |
CA920080A (en) | 1973-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
8339 | Ceased/non-payment of the annual fee |