US2236494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind driven impeller
Assignee: WINCHARGER CORP
•
Filing: 1939-12-16
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Granted: 1941-03-25
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Expires: 1959-12-16
Abstract
No abstract record available.
Inventors
- 👤 Gerhard H Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/06; F03D1/0608; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/30; F05B2240/301; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
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) | 1944-03-24 | 1944-09-23 | 1945-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-24 | 1948-09-23 | 1949-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-24 | 1952-09-23 | 1953-03-25 | $7700.00 | Window Closed / Lapsed |