US2690809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet-operated rotary lifting device
Assignee: Individual
•
Filing: 1950-08-17
•
Granted: 1954-10-05
•
Expires: 1970-08-17
Abstract
No abstract record available.
Inventors
- 👤 Byron J Kerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/005; B; B64; B64C; B64C23/00; B64C23/005; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US364866A
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FR409379A
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US1932702A
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FR859640A
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FR865452A
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US2371687A
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US2397357A
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US2553253A
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US2548804A
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US2446785A
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US2415584A
Cited
FR931296A
Cited
US2465856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |