Patent US1948779A successfully refreshed from Google Patents.
US1948779A
Expired / Lapsed
US
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Adsorption system
Assignee: CHESTER F HOCKLEY
•
Filing: 1931-06-30
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Granted: 1934-02-27
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Expires: 1951-06-30
Abstract
No abstract record available.
Inventors
- 👤 Abbott Cornelius Frederick
- 👤 Charles A Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D2259/00; B01D2259/40; B01D2259/402; Y; Y10; Y10S; Y10S55/00; Y10S55/17
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) | 1937-02-26 | 1937-08-28 | 1938-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-26 | 1941-08-28 | 1942-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-26 | 1945-08-28 | 1946-02-27 | $7700.00 | Window Closed / Lapsed |