Patent US2447007A successfully refreshed from Google Patents.
US2447007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch device
Assignee: Individual
•
Filing: 1941-08-20
•
Granted: 1948-08-17
•
Expires: 1961-08-20
Abstract
No abstract record available.
Inventors
- 👤 Gravina Michel
- 👤 Hawadier Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:44
CPC Classifications
F; F16; F16D; F16D21/00; F16D27/00; F16D47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1933208A
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US1941588A
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US1870647A
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US2077487A
Cited
US2145381A
Cited
US2163991A
Cited
US2071428A
Cited
US2120734A
Cited
FR48566E
Cited
US2180612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |