Patent US2615858A successfully refreshed from Google Patents.
US2615858A
Expired / Lapsed
US
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Polyvinyl chloride organosol compositions containing a non-volatile extract of petroleum
Assignee: Shell Development Co
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Filing: 1950-02-06
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Granted: 1952-10-28
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Expires: 1970-02-06
Abstract
No abstract record available.
Inventors
- 👤 De Loss E Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08K5/0008; C08K5/0016; C08K5/04; C08K5/10; C08K5/12; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L31/00; C08L91/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN ORGANOSOL COMPOSITION COMPRISING FINELY DIVIDED THERMOPLASTIC POLYMER OF VINYL CHLORIDE CONTAINING AT LEAST 90% VINYL CHLORIDE UNITS THEREIN AND HAVING A MOLECULAR WEIGHT ABOVE 20,000 SUSPENDED IN A HOMOGENEOUS LIQUID VEHICLE CONTAINING VOLATILE LIQUID HYDROCARBONS BOILING WITHIN THE RANGE OF 35* C. TO 250* C., AND A PLASTICIZER FOR SAID POLYMER WHICH IS AN ESTER COMPATIBLE THEREWITH AND A PETROLEUM EXTRACT OBTAINED BY EXTRACTING PETROLEUM WITH A NON-REACTIVE HIGHLY POLAR SOLVENT, WHICH ESTER AND EXTRACT EACH BOIL ABOVE 125* C. AT 1 MM. HG PRESSURE, SAID HYDROCARBONS BEING PRESENT IN AMOUNT OF 50 TO 300 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER AND SAID PLASTICIZER BEING PRESENT IN AMOUNT OF 40 TO 150 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER, AND SAID EXTRACT CONSTITUTING FROM 20% OF SAID PLASTICIZER UP TO LESS THAN THAT PROPORTION AT WHICH THE MIXTURE OF SAID EXTRACT AND SAID ESTER CEASES TO BE COMPATIBLE WITH SAID POLYMER.
Claim 2
Dependent Claim
157 words
AN ORGANOSOL COMPOSITION COMPRISING FINELY DIVIDED THERMOPLASTIC POLYMER OF VINYL CHLORIDE CONTAINING AT LEAST 90% VINYL CHLORIDE UNITS THEREIN AND HAVING A MOLECULAR WEIGHT ABOVE 20,000 SUSPENDED IN A HOMOGENEOUS LIQUID VEHICLE CONTAINING VOLATILE LIQUID HYDROCARBONS BOILING WITHIN THE RANGE OF 35* C. TO 250* C., AND A PLASTICIZER FOR SAID POLYMER WHICH IS AN ESTER COMPATIBLE THEREWITH AND A PETROLEUM EXTRACT OBTAINED BY EXTRACTING PETROLEUM WITH A NON-REACTIVE HIGHLY POLAR SOLVENT, WHICH ESTER AND EXTRACT EACH BOIL ABOVE 125* C. AT 1 MM. HG PRESSURE, SAID HYDROCARBONS BEING PRESENT IN AMOUNT OF 50 TO 300 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER AND SAID PLASTICIZER BEING PRESENT IN AMOUNT OF 40 TO 150 PARTS BY WEIGHT PER 100 PARTS OF SAID POLYMER, AND SAID EXTRACT CONSTITUTING FROM 20% OF SAID PLASTICIZER UP TO LESS THAN THAT PROPORTION AT WHICH THE MIXTURE OF SAID EXTRACT AND SAID ESTER CEASES TO BE COMPATIBLE WITH SAID POLYMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |