US2880831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuits for the control of an electromagnetic clutch
Assignee: Valeo SE
•
Filing: 1953-07-21
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Granted: 1959-04-07
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Expires: 1973-07-21
Abstract
No abstract record available.
Inventors
- 👤 Maurice Jean
- 👤 Rist Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:43
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; F16D2500/00; F16D2500/30; F16D2500/304; F16D2500/3042; F16D2500/30426; F16D2500/308; F16D2500/30806; F16D2500/314; F16D2500/3146; F16D2500/31466; F16D2500/50; F16D2500/504; F16D2500/5045; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7041; F16D2500/70418
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |