US3607819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butadiene-styrene copolymer interconnected with silicon oil-extended and stabilized
Assignee: Bridgestone Firestone Inc
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Filing: 1969-06-16
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Granted: 1971-09-21
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Expires: 1989-06-16
Abstract
Abstract An unvulcanized interconnected linear rubbery polymer of conjugated dienes of 4 and 5 carbon atoms and copolymers thereof with olefins, preferably oil diluted, is stabilized by the reaction product of boric acid and salicylic acid.
Inventors
- 👤 Joseph A Beckman
- 👤 Jerry Donald Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/55
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
The composition of claim 1 in which the interconnected copolymer is extended with substantially 37.5 parts of processing oil.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |