US3491031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of monoethanolamine impregnated activated carbon
Assignee: Calgon Carbon Corp
•
Filing: 1966-11-18
•
Granted: 1970-01-20
•
Expires: 1986-11-18
Abstract
No abstract record available.
Inventors
- 👤 George R Stoneburner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
C; C10; C10K; C10K3/00; B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/30; B01J20/34; B01J20/3416; B01J20/345; B01J20/3458; C07; C07C; C07C7/00; C07C7/12; C10G; C10G5/00; C10G5/02; B01D2253/00; B01D2253/25; B01D2257/00; B01D2257/50; B01D2257/504; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151; Y02P20/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE18958E
Cited
US2464532A
Cited
US2815760A
Cited
US2818323A
Cited
US2778715A
Cited
US3391988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |