US2664981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetically controlled friction clutch
Assignee: Siper S A Emsallah
•
Filing: 1950-03-13
•
Granted: 1954-01-05
•
Expires: 1970-03-13
Abstract
No abstract record available.
Inventors
- 👤 D Ozouville Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:42
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US741895A
Cited
US1825686A
Cited
US1756907A
Cited
US1925956A
Cited
US2102318A
Cited
FR883523A
Cited
GB617406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |