Patent US2644398A successfully refreshed from Google Patents.
US2644398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant torque clutch
Assignee: United States Department of the Army
•
Filing: 1947-12-17
•
Granted: 1953-07-07
•
Expires: 1967-12-17
Abstract
No abstract record available.
Inventors
- 👤 Rabinow Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:00
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/06; F42C11/00; F42C11/04; F42C15/00; F42C15/18; F42C15/188; F42C15/28; F42C15/295; F42C9/00; F42C9/02; F42C9/04; F42C9/041; F42C9/14; F42C9/141
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US676139A
Cited
US1486593A
Cited
US1830924A
Cited
US2151724A
Cited
US2190374A
Cited
US2389383A
Cited
US2444411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |