US3772242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubbers reinforced by scrap rubber char
Assignee: Bridgestone Firestone Inc
•
Filing: 1972-06-05
•
Granted: 1973-11-13
•
Expires: 1992-06-05
Abstract
Abstract SCRAP SYNTHETIC RUBBER IS DESTRUCTIVELY DISTILLED TO PRODUCE A CHAR. THIS CHAR, WHEN GROUND, IS USED IN THE REINFORCEMENT OF RUBBERS.
Inventors
- 👤 J Liska
- 👤 J Beckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:27
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/07; C07; C07C; C07C4/00; C07C4/22; C08; C08K; C08K3/00; C08K3/02; C08K3/04; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/143
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |