US2631139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diolefin copolymer rubber plasticized with tough styrene-isobutylene copolymers
Assignee: Standard Oil Development Co
•
Filing: 1945-12-04
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Granted: 1953-03-10
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Expires: 1965-12-04
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:42
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L9/06; C08L25/00; C08L25/02; C08L25/04; C08L25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A COMPOSITION COMPRISING ESSENTIALLY 9/% BY WEIGHT OF A SYNTHETIC RUBBER MADE OF 74% BUDADIENE AND 26% OF ACRYLONITRILE, HAVING ADMIXED THEREWITH ABOUT 10% BY WEIGHT OF A STYRENE-ISOBUTYLENE COPOLYMER OF 50% COMBINED STYRENE AND HAVING AN INTRINSIC VISCOSITY OF 0.6 TO 3.0.
Claim 2
Dependent Claim
43 words
A COMPOSITION COMPRISING ESSENTIALLY 9/% BY WEIGHT OF A SYNTHETIC RUBBER MADE OF 74% BUDADIENE AND 26% OF ACRYLONITRILE, HAVING ADMIXED THEREWITH ABOUT 10% BY WEIGHT OF A STYRENE-ISOBUTYLENE COPOLYMER OF 50% COMBINED STYRENE AND HAVING AN INTRINSIC VISCOSITY OF 0.6 TO 3.0.
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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |