NL54632C - - Google Patents
Info
- Publication number
- NL54632C NL54632C NL54632DA NL54632C NL 54632 C NL54632 C NL 54632C NL 54632D A NL54632D A NL 54632DA NL 54632 C NL54632 C NL 54632C
- Authority
- NL
- Netherlands
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/04—Monomers containing three or four carbon atoms
- C08F210/08—Butenes
- C08F210/10—Isobutene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F244/00—Coumarone-indene copolymers
-
- 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
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
-
- 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
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
- C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
-
- 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
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
-
- 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
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
-
- 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
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
-
- 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
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
- C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
-
- 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
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
-
- 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
- C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2211/02—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/06—Groups 3 or 13
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/08—Groups 4 or 14
-
- 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
- C10N2040/14—Electric or magnetic purposes
- C10N2040/16—Dielectric; Insulating oil or insulators
-
- 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
- C10N2040/14—Electric or magnetic purposes
- C10N2040/17—Electric or magnetic purposes for electric contacts
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US154199A US2274749A (en) | 1937-07-17 | 1937-07-17 | Hydrocarbon copolymer and method of preparing same |
Publications (1)
Publication Number | Publication Date |
---|---|
NL54632C true NL54632C (fr) |
Family
ID=22550396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL54632D NL54632C (fr) | 1937-07-17 |
Country Status (2)
Country | Link |
---|---|
US (1) | US2274749A (fr) |
NL (1) | NL54632C (fr) |
Families Citing this family (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441553A (en) * | 1942-08-03 | 1948-05-18 | Dow Chemical Co | Liquid organic fumigant containing polystyrene |
US2433851A (en) * | 1942-11-13 | 1948-01-06 | Standard Oil Dev Co | Pour point depressant |
US2422278A (en) * | 1943-12-01 | 1947-06-17 | Standard Oil Dev Co | Lubricating oil composition |
US2491526A (en) * | 1944-07-07 | 1949-12-20 | Standard Oil Dev Co | Modified copolymer compositions and manufacture and use thereof |
US2580050A (en) * | 1944-10-06 | 1951-12-25 | Standard Oil Dev Co | Tough styrene-olefin copolymers containing two to ten per cent of wax |
BE462350A (fr) * | 1944-10-06 | 1900-01-01 | Standard Oil Dev Co | |
US2516741A (en) * | 1944-10-12 | 1950-07-25 | Standard Oil Dev Co | Composition of brittle resin and styrene-isobutylene copolymer |
US2468534A (en) * | 1944-11-23 | 1949-04-26 | Standard Oil Dev Co | Tough, flexible, polyamide resinhydrocarbon resin compositions |
US2595911A (en) * | 1944-12-29 | 1952-05-06 | Standard Oil Dev Co | Paraffin wax-styrene isobutylene copolymer composition |
US2572959A (en) * | 1945-03-24 | 1951-10-30 | Standard Oil Dev Co | Packaging tacky isobutylene-diolefin rubber in film of compatible styrene-isobutylene copolymer |
US2500082A (en) * | 1945-04-04 | 1950-03-07 | Standard Oil Dev Co | Acylated derivatives of high molecular weight copolymers |
US2545522A (en) * | 1945-04-04 | 1951-03-20 | Standard Oil Dev Co | Olefin-dihydronaphthalene copolymers |
US2539824A (en) * | 1945-04-20 | 1951-01-30 | Standard Oil Dev Co | Nitration derivatives of hydrocarbon copolymers |
US2472495A (en) * | 1945-05-03 | 1949-06-07 | Standard Oil Dev Co | Condensation product of a polyhalogenated aliphatic hydrocarbon and a copolymer of a polymerizable cyclic compound and an unsaturated aliphatic hydrocarbon |
US2638445A (en) * | 1945-05-05 | 1953-05-12 | Standard Oil Dev Co | Sulfonated high molecular weight styrene-olefin copolymers |
US2446536A (en) * | 1945-05-12 | 1948-08-10 | Standard Oil Dev Co | Treatment of styrene-isobutylene polymer films and resultant product |
US2525071A (en) * | 1945-11-30 | 1950-10-10 | Standard Oil Dev Co | Laminated sheet material and compositions |
US2631139A (en) * | 1945-12-04 | 1953-03-10 | Standard Oil Dev Co | Diolefin copolymer rubber plasticized with tough styrene-isobutylene copolymers |
US2519092A (en) * | 1946-03-12 | 1950-08-15 | Standard Oil Dev Co | Compositions of different styreneisobutylene copolymers |
US2609359A (en) * | 1946-03-21 | 1952-09-02 | Standard Oil Dev Co | Copolymers of a polyene, an alkene, and an olefinically unsaturated aromatic hydrocarbon |
US2442643A (en) * | 1946-04-02 | 1948-06-01 | California Research Corp | Process of activating polymerization of hydrocarbons |
US2442645A (en) * | 1946-04-02 | 1948-06-01 | California Research Corp | Polymerization of unsaturated hydrocarbons |
US2442644A (en) * | 1946-04-02 | 1948-06-01 | California Research Corp | Method of controlling viscosity of hydrocarbon polymers |
US2537130A (en) * | 1946-08-24 | 1951-01-09 | Standard Oil Dev Co | Process of recovering an isobutylene copolymer |
US2554245A (en) * | 1946-09-17 | 1951-05-22 | Standard Oil Dev Co | Complex friedel-crafts catalyst containing aromatic hydrocarbons |
US2610962A (en) * | 1946-12-03 | 1952-09-16 | Dow Chemical Co | Styrene copolymer mixtures |
US2504779A (en) * | 1947-10-18 | 1950-04-18 | Standard Oil Dev Co | Lubricating grease |
US2491054A (en) * | 1947-10-25 | 1949-12-13 | Standard Oil Dev Co | Lubricating grease |
US2491055A (en) * | 1947-10-25 | 1949-12-13 | Standard Oil Dev Co | Grease compositions |
US2603627A (en) * | 1948-03-06 | 1952-07-15 | Standard Oil Dev Co | Lubricating oil additive materials prepared by condensing alkyl halides with haloaromatic-aliphatic hydrocarbon copolymers |
US2522455A (en) * | 1948-06-24 | 1950-09-12 | Standard Oil Dev Co | Mineral oil containing a copolymer of an aliphatic monoolefin and dihydronaphthalene |
BE638356A (fr) * | 1948-10-29 | |||
US2618624A (en) * | 1949-02-15 | 1952-11-18 | Standard Oil Dev Co | Composition of styrene and isobutylene polymers |
US2572184A (en) * | 1949-02-24 | 1951-10-23 | United Shoe Machinery Corp | Unsupported box toe and counter materials |
US2658872A (en) * | 1949-03-05 | 1953-11-10 | Standard Oil Dev Co | Modified copolymers and preparation and uses thereof |
US2530099A (en) * | 1949-04-12 | 1950-11-14 | Us Rubber Co | Adhesive composition and structure embodying same |
US2611760A (en) * | 1949-05-18 | 1952-09-23 | Universal Oil Prod Co | Condensation product of formaldehyde with a copolymer of a vinyl aromatic compound and an aliphatic mono-olefin and process of making same |
US2683138A (en) * | 1949-08-20 | 1954-07-06 | Standard Oil Dev Co | Propylene-isoolefin-cyclic olefin tripolymer |
US2643993A (en) * | 1949-09-13 | 1953-06-30 | Standard Oil Dev Co | Continuous process for copolymerizing styrene and isobutylene |
US2641595A (en) * | 1949-12-31 | 1953-06-09 | Standard Oil Dev Co | Production of clear transparent polymers |
US2610948A (en) * | 1950-03-23 | 1952-09-16 | Standard Oil Dev Co | Lubricating compositions |
US2656340A (en) * | 1950-07-27 | 1953-10-20 | Standard Oil Dev Co | Aromatic-alkene copolymers of less than 5 per cent aromatic content |
US2731450A (en) * | 1951-11-01 | 1956-01-17 | Exxon Research Engineering Co | Thermosetting resins |
US2752326A (en) * | 1952-03-29 | 1956-06-26 | Exxon Research Engineering Co | Oxycresyl camphene as a light stabilizer for copolymer of isobutylene and styrene |
US2845359A (en) * | 1953-12-29 | 1958-07-29 | Exxon Research Engineering Co | Asphalt composition |
US2910458A (en) * | 1954-06-28 | 1959-10-27 | Exxon Research Engineering Co | Tripolymer of styrene, c tertiary and non-tertiary monoolefin |
US2814595A (en) * | 1955-03-28 | 1957-11-26 | Exxon Research Engineering Co | Open gear lubricants |
US2876199A (en) * | 1955-04-22 | 1959-03-03 | Exxon Research Engineering Co | Lubricants |
US2935486A (en) * | 1955-07-05 | 1960-05-03 | Exxon Research Engineering Co | Asphalt, isobutylene-styrene copolymer, hydrocarbon oil adhesive for laminates |
US2917485A (en) * | 1955-10-05 | 1959-12-15 | Exxon Research Engineering Co | Composition of high molecular weight polyisobutylene and low molecular weight styrene-isobutylene resinous copolymers |
US2830973A (en) * | 1955-12-09 | 1958-04-15 | Exxon Research Engineering Co | Preparation of olefin-aromatic copolymers with cross-linking agents |
US2857339A (en) * | 1955-12-28 | 1958-10-21 | Monsanto Chemicals | Steeping method for preparing foamable styrene polymer particles containing rubbery isobutylene polymer |
US2795571A (en) * | 1956-04-17 | 1957-06-11 | Du Pont | Catalytic process for polymerizing trioxane to tough, high molecular weight polyoxymethylene |
US2866780A (en) * | 1957-03-06 | 1958-12-30 | Exxon Research Engineering Co | Production of low ash resin |
US3091601A (en) * | 1957-09-20 | 1963-05-28 | Union Carbide Corp | Olefinic copolymers |
US3183210A (en) * | 1959-11-06 | 1965-05-11 | Zh Nihon Kagaku Seni Kenkyusho | Polymerization of aldehyde by organometallic compound |
NL263451A (fr) * | 1960-04-23 | |||
BE603087A (fr) * | 1960-04-26 | |||
BE624174A (fr) * | 1961-10-30 | |||
US3220989A (en) * | 1962-07-24 | 1965-11-30 | Standard Oil Co | Nuclear phosphonated polystyrene polymer |
US3506616A (en) * | 1965-01-26 | 1970-04-14 | Ethyl Corp | Polyoxymethylene interpolymers |
US3422072A (en) * | 1966-01-26 | 1969-01-14 | Borden Co | Polymerization of aldehydes in the presence of anhydrous polar solvents and alkali metal alkoxide catalysts |
US3500603A (en) * | 1967-01-03 | 1970-03-17 | Protective Treatments | Self-supporting,nonload-bearing resilient tape sealant |
US3403134A (en) * | 1967-07-20 | 1968-09-24 | British Industrial Plastics | Process for preparing copolymers of trioxane with alicyclic olefinically unsaturated hydrocarbons and resultant product |
AU439444B2 (en) * | 1968-05-10 | 1973-08-16 | Velsicol Chemical Corporation | Copolymers and perparational method therefor |
JPS50760B1 (fr) * | 1971-07-01 | 1975-01-11 |
-
0
- NL NL54632D patent/NL54632C/xx active
-
1937
- 1937-07-17 US US154199A patent/US2274749A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2274749A (en) | 1942-03-03 |