Patent US1919685A successfully refreshed from Google Patents.
Patent US2761283A successfully refreshed from Google Patents.
US2761283A
Expired / Lapsed
US
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Resonant type jet propulsion engines
Assignee: Individual
•
Filing: 1951-07-23
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Granted: 1956-09-04
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Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Robert E Houle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2480540A
Cited
US2581902A
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US2505757A
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US2508396A
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US2525782A
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US2538179A
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US2523308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |