Patent DE580898C successfully refreshed from Google Patents.
US1659136A
Expired / Lapsed
US
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Assignee: —
•
Filing: —
•
Granted: 1928-02-14
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Expires: 1945-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/28; B01; B01D; B01D35/00; B01D35/06; F; F01; F01M; F01M1/00; F01M1/10; F01M5/00; F01M5/002; B03C2201/00; B03C2201/18
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) | 1931-02-13 | 1931-08-15 | 1932-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-13 | 1935-08-15 | 1936-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-13 | 1939-08-15 | 1940-02-14 | $7700.00 | Window Closed / Lapsed |