US1790175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind-driven power device
Assignee: FRANKLIN H HAMILTON
•
Filing: 1928-09-06
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Granted: 1931-01-27
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Expires: 1948-09-06
Abstract
No abstract record available.
Inventors
- 👤 Charles H Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
F; F03; F03D; F03D3/00; F03D3/04; F03D3/0436; F03D3/0445; F03D3/0454; F03D3/02; F03D9/00; F03D9/20; F03D9/25; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/21; F05B2240/221; F05B2240/2212; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/74
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) | 1934-01-26 | 1934-07-28 | 1935-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-01-26 | 1938-07-28 | 1939-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-01-26 | 1942-07-28 | 1943-01-27 | $7700.00 | Window Closed / Lapsed |