US3790646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-resistant polymer composition
Assignee: Individual
•
Filing: 1972-04-24
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Granted: 1974-02-05
•
Expires: 1992-04-24
Abstract
Abstract AN OIL-RESISTANT POLYMER COMPOSITION COMPRISING (1) 5 TO 50% BY WEIGHT OF A COPOLYMER CONSISTING ESSENTIALLY OF 20 TO 50% BY WEIGHT OF ACRYLONITRILE, 50 TO 80% BY WEIGHT OF A DIENE SELECTED FROM BUTADIENE AND ISOPRENE AND 0.1 TO 10% BY WEIGHT OF AN A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID AND HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 500 TO 10,000 AND (II) 95 TO 50% BY WEIGHT OF AN ACRYLONITRILE/BUTADIENE COPOLYMER.
Inventors
- 👤 T Ohishi
- 👤 H Fukushima
- 👤 H Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:40
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |