Patent US3337494A successfully refreshed from Google Patents.
US3337494A
Expired / Lapsed
US
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Stabilization of isoprene polymer with n, n'-di(1-ethyl-3-methylpentyl)-p-phenylenediamine
Assignee: Bridgestone Firestone Inc
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Filing: 1966-02-28
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Granted: 1967-08-22
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Robert J Reid
- 👤 Wendell R Conard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:52
CPC Classifications
C; C09; C09D; C09D109/00; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
RUBBERY SYNTHETIC ISOPRENE POLYMER HAVING THE FOLLOWING COMPOSITION AS DETERMINED BY INFRARED ANALYSIS:
Claim 2
Dependent Claim
13 words
RUBBERY SYNTHETIC ISOPRENE POLYMER HAVING THE FOLLOWING COMPOSITION AS DETERMINED BY INFRARED ANALYSIS:
References Cited (Backward Citations)
US2867604A
Cited
US3004035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |