US2499772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid air turbine
Assignee: Individual
•
Filing: 1944-06-24
•
Granted: 1950-03-07
•
Expires: 1964-06-24
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:05
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/08; F01K25/10; F02; F02C; F02C1/00; F02C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US750974A
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US671608A
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FR376945A
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US1012813A
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GB190926633A
Cited
US1071887A
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US1281644A
Cited
GB111381A
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GB254331A
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CH126039A
Cited
US2046314A
Cited
US1978837A
Cited
US2393808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |