US3635862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polymer compositions
Assignee: Polysar Ltd
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Filing: 1969-12-03
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Granted: 1972-01-18
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Expires: 1989-12-03
Abstract
Abstract RESISTANCE TO AGING OF A POLYMER OF CONJUGATED DIOLEFIN SUCH AS A HIGH CIS-1,4 POLYBUTADIEINE OR A BLOCK COPOLYMER OF BUTADIENE AND STYRENE OR ALPHA METHYL STYRENE IS IMPROVED BY THE ADDITION OF 0.1-5 PARTS OF A COMPOUND SUCH AS 2-MERCAPTOBENZIMIDAZOLE, 2-MERCAPTOBENZOXAZOLE OR A HYDROCARBYL SUBSTITUTED DITHIOHYDANTOIN.
Inventors
- 👤 John Robert Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/39
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |