Patent US3332684A successfully refreshed from Google Patents.
Patent US2499863A successfully refreshed from Google Patents.
US2499863A
Expired / Lapsed
US
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Rotary jet-propelled motor
Assignee: Individual
•
Filing: 1945-06-21
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Granted: 1950-03-07
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Expires: 1965-06-21
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/14; F02C3/16; F02C3/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR408744A
Cited
GB188103561A
Cited
GB190513019A
Cited
FR422557A
Cited
US1049213A
Cited
FR457182A
Cited
US1934237A
Cited
GB440500A
Cited
US2222183A
Cited
US2407824A
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 |