US2633923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller slip clutch
Assignee: Kiekhaefer Corp
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Filing: 1950-06-28
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Granted: 1953-04-07
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Expires: 1970-06-28
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Hartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/20; B; B63; B63H; B63H20/00; B63H20/14; B63H20/20; B63H2020/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |