US1995293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of gas treatment
Assignee: Wyeth Holdings LLC
•
Filing: 1932-11-18
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Granted: 1935-03-26
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Expires: 1952-11-18
Abstract
No abstract record available.
Inventors
- 👤 Cyril B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:33
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/30; B01D46/32; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/765
Claims Analysis
Total Claims: 0
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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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |