US3822218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of activated carbon from rubber and a carbonaceous binder
Assignee: SGL Carbon Corp
•
Filing: 1972-09-14
•
Granted: 1974-07-02
•
Expires: 1992-09-14
Abstract
Abstract A DENSE, SOLID PELLET OF CARBON SUITABLE FOR ACTIVATION IS PREPARED FROM SCRAP RUBBER, TIRES, AND OTHER RUBBER VULCANIZATES BY ADDING A CARBONACEOUS BINDER TO THE RUBBER PRIOR TO DESTRUCTIVE DISTILLATION THEREOF.
Inventors
- 👤 M Whittaker
- 👤 L Grindstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:07
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/324
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |