US3150105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet oxidative reactivation of spent active carbon
Assignee: Unilever Bestfoods North America
•
Filing: 1961-01-12
•
Granted: 1964-09-22
•
Expires: 1981-01-12
Abstract
No abstract record available.
Inventors
- 👤 Willard E Ledding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:50
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS OF REACTIVATING SPENT CARBON CONTAINING OXIDIZABLE IMPURITIES, WHICH COMRPISES CONTACTING AN AQUEOUS SLURRY OF SAID SPENT CARBON WITH A GAS CONTAINING MOLECULAR OXYGEN AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF AT LEAST 300*F., AND DISCONTINUING SAID TREATMENT BEFORE SAID CARBON IS SUBSTANTIALLY OXIDIZED.
Claim 2
Dependent Claim
46 words
A PROCESS OF REACTIVATING SPENT CARBON CONTAINING OXIDIZABLE IMPURITIES, WHICH COMRPISES CONTACTING AN AQUEOUS SLURRY OF SAID SPENT CARBON WITH A GAS CONTAINING MOLECULAR OXYGEN AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF AT LEAST 300*F., AND DISCONTINUING SAID TREATMENT BEFORE SAID CARBON IS SUBSTANTIALLY OXIDIZED.
References Cited (Backward Citations)
US1507521A
Cited
US1771719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |