Patent US1624375A successfully refreshed from Google Patents.
Patent US2684731A successfully refreshed from Google Patents.
US2684731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated carbon adsorption and regeneration
Assignee: Standard Oil Development Co
•
Filing: 1949-09-21
•
Granted: 1954-07-27
•
Expires: 1969-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Starr
- 👤 Edwin J Newchurch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:41
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/10; B01D53/08; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/70; B01D2257/702; B01D2259/00; B01D2259/40; B01D2259/40083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A ADSORPTION PROCESS WHICH COMPRISES CONTACTING FEED GASES WITH AN ACTIVE CARBON IN AN ADSORPTION ZONE, REMOVING TAIL GASES OVERHEAD FROM SAID ADSORPTION ZONE, REMOVING CARBON CONTAINING ADSORBED CONSTITUENTS THEREON FROM SAID ADSORPTION ZONE AND SEPARATING SAID ADSORBED CONSTITUENTS FROM SAID CARBON IN A DESORPTION ZONE, THE IMPROVEMENT WHICH COMPRISES THEREAFTER CONTACTING SAID DESORBED CARBON IN AN INITIAL REACTIVATION ZONE WITH AT LEAST A PORTION OF SAID TAIL GASES AT A TEMPERATURE OF 900* F. TO 1100* C. AND THEREAFTER FURTHER TREATING SAID CAR-
Claim 2
Dependent Claim
85 words
IN A ADSORPTION PROCESS WHICH COMPRISES CONTACTING FEED GASES WITH AN ACTIVE CARBON IN AN ADSORPTION ZONE, REMOVING TAIL GASES OVERHEAD FROM SAID ADSORPTION ZONE, REMOVING CARBON CONTAINING ADSORBED CONSTITUENTS THEREON FROM SAID ADSORPTION ZONE AND SEPARATING SAID ADSORBED CONSTITUENTS FROM SAID CARBON IN A DESORPTION ZONE, THE IMPROVEMENT WHICH COMPRISES THEREAFTER CONTACTING SAID DESORBED CARBON IN AN INITIAL REACTIVATION ZONE WITH AT LEAST A PORTION OF SAID TAIL GASES AT A TEMPERATURE OF 900* F. TO 1100* C. AND THEREAFTER FURTHER TREATING SAID CAR-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |