Patent US2981390A successfully refreshed from Google Patents.
US2981390A
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Transmission clutch shift facilitation device
Assignee: Motors Liquidation Co
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Filing: 1958-03-31
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Granted: 1961-04-25
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Doerper Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:09
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D2023/0656; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284; Y10T74/19949; Y10T74/19963; Y10T74/19967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US694784A
Cited
US2259527A
Cited
US2410643A
Cited
GB711201A
Cited
US2665788A
Cited
US2762477A
Cited
US2821277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |