US2940946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Allyl alcohol-vinyl aromatic copolymers
Assignee: Shell USA Inc
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Filing: 1957-07-22
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Granted: 1960-06-14
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Expires: 1977-07-22
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
- 👤 Paul A Devlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:47
CPC Classifications
C; C09; C09D; C09D129/00; C08; C08F; C08F16/00; C08F212/00; C08F212/02; C08F212/04; C08F8/00; C08F8/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A SYNTHETIC DRYING FATTY ESTER HAVING AN ACID NUMBER LESS THAN 20 WHICH COMPRISES THE REACTION PRODUCT OF A FATTY ACID OF 12 TO 20 CARBON ATOMS AND AN ALLYL ALCOHOL-MONO-VINYL AROMATIC COPOLYMER, THE MONO-VINYL AROMATIC BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE, PARA-METHYL STYRENE, ORTHO-METHYL STYRENE, METAMETHYL STYRENE, 2,4-DIMETHYL STYRENE, PARA-CHLOROSTYRENE, PARA-ETHYL STYRENE AND BETA-VINYL NAPHTHYLENE, THE COPOLYMER CONTTAINING FROM ABOUT 15% TO ABOUT 85% BY WEIGHT, OF COMBINED VINYL AROMATIC, THE COPOLYMER HAVING A MOLECULAR WEIGHT RANGING FROM ABOUT 300 TO ABOUT 4000, BEING ESSENTIALLY FREE OF CARBONYL VALUES, HAVING A COLOR RANGING FROM ESSENTIALLY COLORLESS TO A LIGHT YELLOW AND BEING FREE OF GEL AFTER HEATING FOR FOUR HOURS AT 250*C., THE COPOLYMER BEING FURTHER CHARACTERIZED AS BEING INSOLUBLE IN WATER AND MINERAL ACID AND BEING SOLUBLE IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ACETONE, CHLOROFORM, BENZENE AND TOLUENE.
Claim 2
Dependent Claim
146 words
A SYNTHETIC DRYING FATTY ESTER HAVING AN ACID NUMBER LESS THAN 20 WHICH COMPRISES THE REACTION PRODUCT OF A FATTY ACID OF 12 TO 20 CARBON ATOMS AND AN ALLYL ALCOHOL-MONO-VINYL AROMATIC COPOLYMER, THE MONO-VINYL AROMATIC BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE, PARA-METHYL STYRENE, ORTHO-METHYL STYRENE, METAMETHYL STYRENE, 2,4-DIMETHYL STYRENE, PARA-CHLOROSTYRENE, PARA-ETHYL STYRENE AND BETA-VINYL NAPHTHYLENE, THE COPOLYMER CONTTAINING FROM ABOUT 15% TO ABOUT 85% BY WEIGHT, OF COMBINED VINYL AROMATIC, THE COPOLYMER HAVING A MOLECULAR WEIGHT RANGING FROM ABOUT 300 TO ABOUT 4000, BEING ESSENTIALLY FREE OF CARBONYL VALUES, HAVING A COLOR RANGING FROM ESSENTIALLY COLORLESS TO A LIGHT YELLOW AND BEING FREE OF GEL AFTER HEATING FOR FOUR HOURS AT 250*C., THE COPOLYMER BEING FURTHER CHARACTERIZED AS BEING INSOLUBLE IN WATER AND MINERAL ACID AND BEING SOLUBLE IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ACETONE, CHLOROFORM, BENZENE AND TOLUENE.
References Cited (Backward Citations)
US2588890A
Cited
US2630430A
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US2521754A
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US2656334A
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US2855388A
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US2894938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |