US2630430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Allyl alcohol-styrene copolymers
Assignee: Shell Development Co
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Filing: 1951-10-23
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Granted: 1953-03-03
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Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
- 👤 Paul A Devlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
C; C08; C08F; C08F16/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A COPOLYMER OF ALLYL ALCOHOL AND STYRENE SUITABLE FOR USE IN PREPARING DRYING ESTERS THEREFROM, SAID COPOLYMER CONTAINING 30% TO 80% OF COMBINED STYRENE AND OBTAINED BY HEATING A LIQUID MIXTURE OF POLYMERIZABLE COMPOUNDS CONSISTING OF ALLYL ALCOHOL AND STYRENE AT 100* C. TO 200* C. WHILE BUBBLING OXYGEN THERETHROUGH.
References Cited (Backward Citations)
US2588890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |