US3751525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket-forming compositions
Assignee: Individual
•
Filing: 1970-09-28
•
Granted: 1973-08-07
•
Expires: 1990-09-28
Abstract
Abstract THE OXIDATION RESISTANCE OF GASKET-FORMING COMPOSITIONS CONTAINING A THERMOPLASTIC STYRENE-BUTADIENE-STYRENE TYPE BLOCK COPOLYMER IS ENHANCED BY INCORPORATING INTO THEM, IN ADDITION TO CONVENTIONAL QUANTITIES OF N,N''-DINAPHTHYLP-PHENYLENEDIAMINE, A SMALL PERCENTAGE OF CALCIUM, MAGNESIUM, ZINC OR ALUMINUM OXIDE.
Inventors
- 👤 M Brenner
- 👤 F Chase
- 👤 A Leydon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:30
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/16; C08K5/17; C08K5/18
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |