US3769256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubbery compositions
Assignee: Individual
•
Filing: 1972-04-18
•
Granted: 1973-10-30
•
Expires: 1992-04-18
Abstract
Abstract RUBBERY COMPOSITION IS PREPARED BY MIXING 100 PARTS BY WEIGHT OF A HYDROGENATED HYDROCARBON COPOLYMER HAVING A GLASS TRANSITION TEMPERATURE OF ABOVE -100*C. AND HAVING POLYMERIC MONOMER UNITS WHICH CONSIST OF (1) 5 TO 60% BY WEIGHT OF VINYL-AROMATIC HYDROCARBON UNITS, (2) NOT LESS THAN 10% BY WEIGHT OF HYDROGENATED CONJUGATED DIOLEFIN UNITS AND (3) UNHYDROGENATED CONJUGATED DIOLEFIN UNITS, WHEREIN SAID VINYL-AROMATIC HYDROCARBON UNITS ARE ESSENTIALLY RANDOMLY DISTRIBUTED IN THE POLYMERIC MONOMER UNITS, AND 5 TO 200 PARTS BY WEIGHT OF AN INORGANIC REINFORCING FILLER HAVING A NUMBER AVERAGE PARTICLE DIAMETER OF LESS THAN 500 MU.
Inventors
- 👤 T Yoshimoto
- 👤 T Imamura
- 👤 K Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:03
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08C; C08C19/00; C08C19/02; C08K3/01; C08K3/013
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |