US2723531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary power supply device for aircraft and constant speed drive mechanism therefor
Assignee: Solar Aircraft Co
•
Filing: 1947-07-21
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Granted: 1955-11-15
•
Expires: 1967-07-21
Abstract
No abstract record available.
Inventors
- 👤 Leon R Wosika
- 👤 Paul A Pitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
B; B64; B64D; B64D41/00; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1089029A
Cited
US1466394A
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US2261670A
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US2419929A
Cited
US2396804A
Cited
US2414766A
Cited
US2462824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |