Patent US3245372A successfully refreshed from Google Patents.
Patent US3801514A successfully refreshed from Google Patents.
US3801514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for regenerating spent active carbon in a suspension-dispersion-transport system
Assignee: FMC Corp
•
Filing: 1971-06-09
•
Granted: 1974-04-02
•
Expires: 1991-06-09
Abstract
Abstract FIG-01 SPENT ACTIVE CARBON, RECOVERED FROM SECONDARY SEWAGE TREATMENT AND FROM BEER AND SUGAR REFINING, IS REGENERATED BY RAPIDLY HEATING IT IN THE DISPERSED PHASE IN THE PRESENCE OF AN ACTIVATING ATMOSPHERE. THE ACTIVATING GASES ARE PREFERABLY STEAM OR CARBON DIOXIDE OR BOTH.
Inventors
- 👤 R Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:07
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |