US1589828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windmill for generating electric energy
Assignee: PERKINS Corp
•
Filing: 1922-02-23
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Granted: 1926-06-22
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Expires: 1942-02-23
Abstract
No abstract record available.
Inventors
- 👤 Edward H Williams
- 👤 Fred L Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/06; F03D1/065; F05; F05B; F05B2220/00; F05B2220/70; F05B2220/706; F05B2240/00; F05B2240/20; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19679
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) | 1929-06-21 | 1929-12-21 | 1930-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-06-21 | 1933-12-21 | 1934-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-06-21 | 1937-12-21 | 1938-06-22 | $7700.00 | Window Closed / Lapsed |