US3795652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel rubbery copolymer compositions
Assignee: Individual
•
Filing: 1972-07-03
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Granted: 1974-03-05
•
Expires: 1992-07-03
Abstract
Abstract RUBBER COMPOSITIONS SUITABLE FOR TIRE TREAD WITH IMPROVED PROCESSABILITYY COMPRISE FROM 25 TO 75 PARTS BY WEIGHT OF A PROCESS OIL HAVING A VISCOSITY-SPECIFIED GRAVITY CONSTANT NOT LESS THAN 0.850 AND FROM 40 TO 100 PARTS BY WEIGHT OF CARBON BLACK PER 100 PARTS BY WEIGHT OF A RUBBER COMPONENT COMPRISING AT LEAST 30% BY WEIGHT OF A COPOLYMER MIXTURE HAVING A MOONEY VISCOSITY FROM 40 TO 150 A RELAXATION TIME FROM 20 TO 200 SEC. AS MEASURED BY A MOONEY VISCOMETER.
Inventors
- 👤 K Sakamoto
- 👤 T Ibaragi
- 👤 K Yamaguchi
- 👤 K Toyomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L9/08; B; B60; B60C; B60C1/00; B60C1/0016; C08L21/00; C08L7/00; C08K; C08K5/00; C08K5/01; Y; Y10; Y10S; Y10S152/00; Y10S152/905
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |