BE492427A - - Google Patents
Info
- Publication number
- BE492427A BE492427A BE492427DA BE492427A BE 492427 A BE492427 A BE 492427A BE 492427D A BE492427D A BE 492427DA BE 492427 A BE492427 A BE 492427A
- Authority
- BE
- Belgium
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
- C08G59/063—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols with epihalohydrins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6407—Reaction products of epoxy resins with at least equivalent amounts of compounds containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4028—Isocyanates; Thioisocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/11—Complex polyesters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
- C10M2215/082—Amides containing hydroxyl groups; Alkoxylated derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/12—Partial amides of polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/12—Partial amides of polycarboxylic acids
- C10M2215/122—Phtalamic acid
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Reinforced Plastic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB30732/48A GB652024A (en) | 1948-11-26 | 1948-11-26 | Improvements in and relating to the production of thermoplastic resins and of threads, fibres, filaments and like products therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
BE492427A true BE492427A (de) | 1949-12-15 |
Family
ID=32188955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE492427D BE492427A (de) | 1948-11-26 | 1949-11-26 |
Country Status (5)
Country | Link |
---|---|
US (1) | US2602075A (de) |
BE (1) | BE492427A (de) |
FR (1) | FR1000337A (de) |
GB (1) | GB652024A (de) |
NL (2) | NL75199C (de) |
Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2728781A (en) * | 1952-03-29 | 1955-12-27 | Shell Dev | Acyloxy substituted-glycidyl polyethers of dihydric phenols |
US2698315A (en) * | 1952-10-21 | 1954-12-28 | Devoe & Raynolds Co | Epoxide resins |
NL103227C (de) * | 1953-04-06 | |||
US2788335A (en) * | 1953-07-20 | 1957-04-09 | Du Pont | Cellular reaction products of castor oil, an epoxy resin, and an aromatic diisocyanate |
US2890203A (en) * | 1954-01-12 | 1959-06-09 | Johnson & Son Inc S C | Alkali soluble resins and compositions containing the same |
US3021304A (en) * | 1954-08-05 | 1962-02-13 | Devoe & Raynolds Co | Epoxide resin compositions |
US2843568A (en) * | 1955-01-31 | 1958-07-15 | Du Pont | Polymeric polyether-polyurethanes |
US3020262A (en) * | 1957-12-19 | 1962-02-06 | Jefferson Chem Co Inc | Method for producing 2-oxazolidones from epoxides and isocyanates |
NL245056A (de) * | 1958-11-20 | |||
US2977371A (en) * | 1959-04-13 | 1961-03-28 | Du Pont | Process for preparation of 2-oxazolidones |
US2977370A (en) * | 1959-04-13 | 1961-03-28 | Du Pont | Production of 2-oxazolidones |
US2977369A (en) * | 1959-04-13 | 1961-03-28 | Du Pont | Production of 2-oxazolidinones |
NL110481C (de) * | 1959-06-15 | 1900-01-01 | Shell Int Research | |
US3277048A (en) * | 1961-01-16 | 1966-10-04 | Dow Chemical Co | Thermoplastic fire-retardant, highpolymer, epoxide resin composition |
NL277175A (de) * | 1961-04-12 | 1900-01-01 | ||
US3277051A (en) * | 1961-09-21 | 1966-10-04 | Union Carbide Corp | Preparation of polyhydroxyethers |
US3306872A (en) * | 1961-10-16 | 1967-02-28 | Shell Oil Co | Method for producing a polyether resin |
NL295541A (de) * | 1962-07-23 | |||
US3346532A (en) * | 1962-09-11 | 1967-10-10 | Gen Tire & Rubber Co | Elastomeric copolymers from dihydric phenols and organic diepoxides, their preparation and cure |
US3156522A (en) * | 1962-11-29 | 1964-11-10 | Nathan H Koenig | Treatment of wool with isocyanateepichlorohydrin mixtures |
US3238087A (en) * | 1962-12-19 | 1966-03-01 | Union Carbide Corp | Method of making laminated structural elements and article produced thereby |
US3242244A (en) * | 1964-05-11 | 1966-03-22 | Union Oil Co | Extrusion of epoxy resin |
US3321549A (en) * | 1964-06-15 | 1967-05-23 | Union Carbide Corp | Thermoplastic polyhydroxyethers modified by the addition of a blend of an epoxy resin and an amine blocked polyisocyanate |
US3288884A (en) * | 1964-07-20 | 1966-11-29 | Dow Chemical Co | Resinous composition comprising a vinyl chloride polymer and a halogenated polyepoxide |
US3364178A (en) * | 1964-12-21 | 1968-01-16 | Shell Oil Co | Thermoplastic poly (hydroxyalkyl diphenyl sulfone) ethers |
GB1176108A (en) * | 1967-06-30 | 1970-01-01 | Du Pont | Epoxy Acrylic Sealer Composition |
US4122067A (en) * | 1977-10-07 | 1978-10-24 | Celanese Polymer Specialties Company | Process of reacting a polyepoxide compound with a phenol in aqueous medium |
US4267301A (en) * | 1979-12-31 | 1981-05-12 | Eastman Kodak Company | Linear hydroquinone phenoxy polymers and process |
US4383101A (en) * | 1979-12-31 | 1983-05-10 | Eastman Kodak Company | Linear hydroquinone phenoxy polymers and process |
US4341693A (en) * | 1980-06-26 | 1982-07-27 | Ciba-Geigy Corporation | Oligomeric epoxide resins and their use as flameproofing agents |
SE457726B (sv) * | 1980-12-18 | 1989-01-23 | Sumitomo Chemical Co | Zinkpulverlack innehaallande en polyhydroxieter |
EP0230099A3 (de) * | 1985-10-28 | 1988-03-16 | Mitsui Petrochemical Industries, Ltd. | Polyhydroxyäther, Verfahren zu deren Herstellung und deren Verwendung |
EP0249262A3 (de) * | 1986-06-09 | 1990-07-04 | Shell Internationale Researchmaatschappij B.V. | Thermoplastische Polymermasse mit Verarbeitungseigenschaften von Duroplasten |
US4954553A (en) * | 1988-09-30 | 1990-09-04 | Union Carbide Chemicals And Plastics Company Inc. | Modified waterborne phenoxy resins |
US5463091A (en) * | 1989-01-17 | 1995-10-31 | The Dow Chemical Company | Diglycidyl ether of 4,4'-dihydroxy-α-methylstilbene |
US5270405A (en) * | 1989-01-17 | 1993-12-14 | The Dow Chemical Company | Mesogenic epoxy compounds |
US5310854A (en) * | 1989-08-23 | 1994-05-10 | The Dow Chemical Company | Epoxy resin composition and process therefor |
US5164472A (en) * | 1990-01-18 | 1992-11-17 | The Dow Chemical Company | Hydroxy-functional polyethers as thermoplastic barrier resins |
US5115075A (en) * | 1990-05-08 | 1992-05-19 | The Dow Chemical Company | Amide and hydroxymethyl functionalized polyethers as thermoplastic barrier resins |
US5218075A (en) * | 1990-05-08 | 1993-06-08 | The Dow Chemical Company | Amide and hydroxymethyl functionalized polyethers as thermoplastic barrier resins |
US5134218A (en) * | 1991-06-06 | 1992-07-28 | The Dow Chemical Company | Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins |
US5206289A (en) * | 1992-01-27 | 1993-04-27 | The Goodyear Tire & Rubber Company | Rubber stock containing a polyhydric phenoxy resin |
ES2301104T3 (es) * | 2005-03-22 | 2008-06-16 | Ems-Chemie Ag | Material fibroso termoplastico hilado a partir de una materia prima que contiene un polihidroxieter, su procedimiento de preparacion y sus utilizaciones. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2060715A (en) * | 1933-01-13 | 1936-11-10 | Du Pont | Synthetic resins |
FR962845A (de) * | 1946-04-10 | 1950-06-21 | ||
NL68296C (de) * | 1946-05-02 | |||
BE487600A (de) * | 1948-02-28 |
-
1948
- 1948-11-26 GB GB30732/48A patent/GB652024A/en not_active Expired
-
1949
- 1949-11-01 US US124944A patent/US2602075A/en not_active Expired - Lifetime
- 1949-11-16 NL NL149925A patent/NL75199C/xx active
- 1949-11-24 FR FR1000337D patent/FR1000337A/fr not_active Expired
- 1949-11-26 BE BE492427D patent/BE492427A/xx unknown
-
1954
- 1954-01-06 NL NL184119A patent/NL78078C/xx active
Also Published As
Publication number | Publication date |
---|---|
US2602075A (en) | 1952-07-01 |
NL78078C (de) | 1955-05-16 |
FR1000337A (fr) | 1952-02-11 |
GB652024A (en) | 1951-04-11 |
NL75199C (de) | 1954-06-16 |