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Patent US2149680A successfully refreshed from Google Patents.
US2149680A
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Assignee: Individual
•
Filing: 1935-02-28
•
Granted: 1939-03-07
•
Expires: 1955-02-28
Abstract
No abstract record available.
Inventors
- 👤 Ira H Jewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:54
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/26; B01D24/00; B01D24/02; B01D24/20; B01D24/22; B01D24/46; B01D24/4631; B01D24/48; B01D2201/00; B01D2201/44; B01D37/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/8593; Y10T137/86389; Y10T137/86405
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) | 1942-03-06 | 1942-09-05 | 1943-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-06 | 1946-09-05 | 1947-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-06 | 1950-09-05 | 1951-03-07 | $7700.00 | Window Closed / Lapsed |