US2951569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic clutch
Assignee: General Electric Co
•
Filing: 1957-04-26
•
Granted: 1960-09-06
•
Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
- 👤 Russell E Tompkins
- 👤 Robert F Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:37
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/08; F16D2027/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US905797A
Cited
US1137804A
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US1126374A
Cited
GB191504718A
Cited
US1481655A
Cited
US2254625A
Cited
US2353750A
Cited
US2523772A
Cited
US2848085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |