Patent US2456639A successfully refreshed from Google Patents.
Patent US3384213A successfully refreshed from Google Patents.
US3384213A
Expired / Lapsed
US
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Electromagnetic clutch with carbon core
Assignee: Motors Liquidation Co
•
Filing: 1966-01-13
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Granted: 1968-05-21
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Expires: 1986-01-13
Abstract
No abstract record available.
Inventors
- 👤 James A Bernard
- 👤 Delmer K Hensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:03
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06; F16D27/10; F16D27/108; F16D27/112; F16D2027/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2698679A
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US2860403A
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US2796963A
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US2950795A
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US3036679A
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US3016580A
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US2919777A
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US3055475A
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US3092307A
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US3205989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |