US2902445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of regenerating a zeolite bed
Assignee: Individual
•
Filing: 1956-12-20
•
Granted: 1959-09-01
•
Expires: 1976-12-20
Abstract
No abstract record available.
Inventors
- 👤 Benjamin H Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:41
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE311900C
Cited
DE290373C
Cited
US1608661A
Cited
US1903612A
Cited
FR770225A
Cited
DE721643C
Cited
US2365293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |