Patent US2981371A successfully refreshed from Google Patents.
US2981371A
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US
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Combined variable displacement pumping mechanism
Assignee: Motors Liquidation Co
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Filing: 1955-04-28
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Granted: 1961-04-25
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Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Earl R Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
F; F16; F16N; F16N13/00; F16N13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US550466A
Cited
CH111841A
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US2031749A
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GB489955A
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US2420155A
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FR988511A
Cited
US2523214A
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US2638973A
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US2612114A
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US2685255A
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US2764941A
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 |