SE372557B - - Google Patents
Info
- Publication number
- SE372557B SE372557B SE7012469A SE1246970A SE372557B SE 372557 B SE372557 B SE 372557B SE 7012469 A SE7012469 A SE 7012469A SE 1246970 A SE1246970 A SE 1246970A SE 372557 B SE372557 B SE 372557B
- Authority
- SE
- Sweden
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/143—Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/16—Hydrocarbons
- C10L1/1625—Hydrocarbons macromolecular compounds
- C10L1/1633—Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds
- C10L1/1641—Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds from compounds containing aliphatic monomers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/188—Carboxylic acids; metal salts thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/1955—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by an alcohol, ether, aldehyde, ketonic, ketal, acetal radical
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1963—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof mono-carboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1966—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof poly-carboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/197—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid
- C10L1/1973—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid mono-carboxylic
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/20—Organic compounds containing halogen
- C10L1/206—Organic compounds containing halogen macromolecular compounds
- C10L1/207—Organic compounds containing halogen macromolecular compounds containing halogen with or without hydrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/2222—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/2222—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
- C10L1/2225—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates hydroxy containing
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/224—Amides; Imides carboxylic acid amides, imides
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85818069A | 1969-09-15 | 1969-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
SE372557B true SE372557B (ru) | 1974-12-23 |
Family
ID=25327678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7012469A SE372557B (ru) | 1969-09-15 | 1970-09-14 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3658493A (ru) |
JP (1) | JPS5036246B1 (ru) |
CA (1) | CA920365A (ru) |
DE (1) | DE2042683C3 (ru) |
DK (1) | DK127790B (ru) |
FR (1) | FR2061372A5 (ru) |
GB (1) | GB1318241A (ru) |
NO (1) | NO127198B (ru) |
SE (1) | SE372557B (ru) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946053A (en) * | 1970-09-30 | 1976-03-23 | Cities Service Oil Company | Hydrocarbyl hydrogen phosphate salts of amino-amides |
US3982909A (en) * | 1975-02-13 | 1976-09-28 | Exxon Research And Engineering Company | Nitrogen-containing cold flow improvers for middle distillates |
US4211534A (en) * | 1978-05-25 | 1980-07-08 | Exxon Research & Engineering Co. | Combination of ethylene polymer, polymer having alkyl side chains, and nitrogen containing compound to improve cold flow properties of distillate fuel oils |
CA1120269A (en) * | 1978-05-25 | 1982-03-23 | Robert D. Tack | Additive combinations and fuels containing them |
SE446012B (sv) * | 1978-05-25 | 1986-08-04 | Exxon Research Engineering Co | Brenslekomposition pa basis av destillatbrennolja samt trekomponentkomposition for anvendning vid framstellning derav |
DE3067578D1 (en) * | 1979-11-23 | 1984-05-24 | Exxon Research Engineering Co | Additive combinations and fuels containing them |
FR2490669A1 (fr) * | 1980-09-19 | 1982-03-26 | Elf France | Nouvelles compositions d'additifs permettant l'amelioration de la temperature limite de filtrabilite et l'inhibition simultanee des cristaux de n-paraffines formes lors du stockage a basse temperature des distillats moyens |
US4402708A (en) * | 1980-11-18 | 1983-09-06 | Exxon Research & Engineering Co. | Dialkyl amine derivatives of phthalic acid |
DE3049553A1 (de) * | 1980-12-31 | 1982-07-29 | Basf Ag, 6700 Ludwigshafen | Erdoeldestillate mit verbessertem kaelteverhalten |
DE3112456A1 (de) * | 1981-03-28 | 1982-10-07 | Hoechst Ag, 6000 Frankfurt | "verfahren zur verbesserung der fliessfaehigkeit von mineraloelen" |
US4464182A (en) * | 1981-03-31 | 1984-08-07 | Exxon Research & Engineering Co. | Glycol ester flow improver additive for distillate fuels |
JPS58138791A (ja) * | 1982-02-10 | 1983-08-17 | Nippon Oil & Fats Co Ltd | 燃料油用流動性向上剤 |
US4623684A (en) | 1982-08-09 | 1986-11-18 | The Lubrizol Corporation | Hydrocarbyl substituted carboxylic acylating agent derivative containing combinations, and fuels containing same |
US4564460A (en) * | 1982-08-09 | 1986-01-14 | The Lubrizol Corporation | Hydrocarbyl-substituted carboxylic acylating agent derivative containing combinations, and fuels containing same |
US4613342A (en) * | 1982-08-09 | 1986-09-23 | The Lubrizol Corporation | Hydrocarbyl substituted carboxylic acylating agent derivative containing combinations, and fuels containing same |
US4575526A (en) * | 1982-08-09 | 1986-03-11 | The Lubrizol Corporation | Hydrocarbyl substituted carboxylic acylaging agent derivative containing combinations, and fuels containing same |
ATE19648T1 (de) * | 1982-09-16 | 1986-05-15 | Exxon Research Engineering Co | Zusatzkonzentrate fuer destillatkraftstoffe. |
JPS59149988A (ja) * | 1983-02-16 | 1984-08-28 | Nippon Oil & Fats Co Ltd | 燃料油用流動性向上剤 |
GB2214517A (en) * | 1988-01-27 | 1989-09-06 | Exxon Chemical Patents Inc | Carrier for additives for liquid hydrocarbons |
DE3817000A1 (de) * | 1988-05-19 | 1989-11-23 | Basf Ag | Kraftstoffe fuer ottomotoren |
CA2042855A1 (en) * | 1990-06-28 | 1991-12-29 | Nicholas Feldman | Composition for improving cold flow properties of middle distillates |
GB9610363D0 (en) * | 1996-05-17 | 1996-07-24 | Ethyl Petroleum Additives Ltd | Fuel additives and compositions |
GB9707367D0 (en) * | 1997-04-11 | 1997-05-28 | Exxon Chemical Patents Inc | Improved oil compositions |
US6017370A (en) * | 1998-09-25 | 2000-01-25 | The Lubrizol Corporation | Fumarate copolymers and acylated alkanolamines as low temperature flow improvers |
GB2446801B (en) | 2007-02-23 | 2011-06-29 | Schlumberger Holdings | Wellbore treatment fluid |
GB2486255A (en) * | 2010-12-09 | 2012-06-13 | Innospec Ltd | Improvements in or relating to additives for fuels and lubricants |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2296069A (en) * | 1940-03-21 | 1942-09-15 | Allied Chem & Dye Corp | Fuel for internal combustion engines |
US2433243A (en) * | 1946-05-21 | 1947-12-23 | Gulf Oil Corp | Diesel fuel oils |
US2604451A (en) * | 1948-09-16 | 1952-07-22 | Gulf Research Development Co | Mineral oil compositions |
US2861874A (en) * | 1954-06-23 | 1958-11-25 | Alox Corp | Corrosion inhibitor for light petroleum solvents and fuels |
US2798045A (en) * | 1954-09-27 | 1957-07-02 | Shell Dev | Lubricating compositions |
US3029136A (en) * | 1955-10-05 | 1962-04-10 | Gulf Research Development Co | Stabilized distillate fuel oils |
US2888340A (en) * | 1957-04-08 | 1959-05-26 | Du Pont | Fuel oil compositions |
US2939842A (en) * | 1957-12-30 | 1960-06-07 | Universal Oil Prod Co | Corrosion inhibitor |
US3035905A (en) * | 1958-02-04 | 1962-05-22 | Union Oil Co | Internal combustion engine fuel |
US2951751A (en) * | 1958-07-30 | 1960-09-06 | Exxon Research Engineering Co | Hydrocarbon oils having improved electrical properties |
US3048479A (en) * | 1959-08-03 | 1962-08-07 | Exxon Research Engineering Co | Ethylene-vinyl ester pour depressant for middle distillates |
US3080222A (en) * | 1960-02-23 | 1963-03-05 | Gulf Research Development Co | Oxo-octyl amine salts of dioxo-octyl phosphoric acid esters |
DE1271456B (de) * | 1961-04-27 | 1968-06-27 | Standard Oil Co | Brennstoffoele |
US3166387A (en) * | 1961-07-17 | 1965-01-19 | Standard Oil Co | Ammonium carboxylate pour point depressants for fuel oil composition |
US3236612A (en) * | 1961-10-10 | 1966-02-22 | Exxon Research Engineering Co | Middle distillate composition of improved pour characteristics |
CA676875A (en) * | 1962-04-02 | 1963-12-24 | William C. Hollyday, Jr. | Pour point depressant for middle distillates |
US3317291A (en) * | 1963-07-16 | 1967-05-02 | Armour & Co | Nonclogging fuel oil compositions |
US3325565A (en) * | 1963-10-01 | 1967-06-13 | Exxon Research Engineering Co | Mixed monoalkyl and dialkyl esters of phosphoric acid partially neutralized with a primary alkyl amine |
US3275427A (en) * | 1963-12-17 | 1966-09-27 | Exxon Research Engineering Co | Middle distillate fuel composition |
US3337313A (en) * | 1964-07-20 | 1967-08-22 | Standard Oil Co | Pour depressant for distillate fuels |
-
1969
- 1969-09-15 US US858180A patent/US3658493A/en not_active Expired - Lifetime
-
1970
- 1970-08-19 CA CA091116A patent/CA920365A/en not_active Expired
- 1970-08-21 GB GB4041870A patent/GB1318241A/en not_active Expired
- 1970-08-28 DE DE2042683A patent/DE2042683C3/de not_active Expired
- 1970-09-11 JP JP45079429A patent/JPS5036246B1/ja active Pending
- 1970-09-14 NO NO03497/70A patent/NO127198B/no unknown
- 1970-09-14 FR FR7033214A patent/FR2061372A5/fr not_active Expired
- 1970-09-14 DK DK471770AA patent/DK127790B/da unknown
- 1970-09-14 SE SE7012469A patent/SE372557B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
GB1318241A (en) | 1973-05-23 |
NO127198B (ru) | 1973-05-21 |
DE2042683A1 (de) | 1971-03-25 |
JPS5036246B1 (ru) | 1975-11-22 |
DE2042683C3 (de) | 1978-11-02 |
CA920365A (en) | 1973-02-06 |
DK127790B (da) | 1974-01-07 |
DE2042683B2 (de) | 1978-03-02 |
FR2061372A5 (ru) | 1971-06-18 |
US3658493A (en) | 1972-04-25 |