Patent US3400941A successfully refreshed from Google Patents.
US3400941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly
Assignee: Ford Motor Co
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Filing: 1967-05-24
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Granted: 1968-09-10
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Expires: 1987-05-24
Abstract
No abstract record available.
Inventors
- 👤 Frank C Hutto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:33
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; F16J9/061; F16J9/063; F16J9/065; F16J9/12; F16J9/20; F16J9/203; F16J9/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2052077A
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US2296116A
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US2861852A
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US3024029A
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US3000678A
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US3080172A
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US3198531A
Cited
US3228704A
Cited
US3282595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |