Patent US2490623A successfully refreshed from Google Patents.
US2490623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet propeller aircraft engine
Assignee: Individual
•
Filing: 1944-10-04
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Granted: 1949-12-06
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Expires: 1964-10-04
Abstract
No abstract record available.
Inventors
- 👤 Samuel J Elsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:48
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1668971A
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US1099083A
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US1569607A
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US1519444A
Cited
GB227151A
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GB366450A
Cited
US1897817A
Cited
US1942100A
Cited
US2011061A
Cited
US2296987A
Cited
US2371687A
Cited
US2397357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |