US2992869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine piston
Assignee: Van Der Horst Corp of America
•
Filing: 1957-04-15
•
Granted: 1961-07-18
•
Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Horst Henderik Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:58
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1717750A
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US1856272A
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US1947493A
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US2124360A
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DE763773C
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US2410405A
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US2403455A
Cited
GB642042A
Cited
US2833264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |