US2534895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary power system for aircraft
Assignee: Westinghouse Electric Corp
•
Filing: 1948-02-28
•
Granted: 1950-12-19
•
Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 Bascum O Austin
- 👤 Omar C Walley
- 👤 Donald W Exner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/20; H02P9/22; H02P2101/00; H02P2101/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718517A
Cited
US1911356A
Cited
US1920096A
Cited
US2089719A
Cited
US2265203A
Cited
US2368953A
Cited
US2399409A
Cited
US2401795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |