US3474709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder liner for barrel engine
Assignee: United States Department of the Navy
•
Filing: 1967-09-28
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Granted: 1969-10-28
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Expires: 1987-09-28
Abstract
No abstract record available.
Inventors
- 👤 Halley H Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
F; F42; F42B; F42B19/00; F42B19/12; F42B19/14; F42B19/16; F16; F16J; F16J10/00; F16J10/02; F16J10/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1299477A
Cited
US1455028A
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US2085976A
Cited
US2464462A
Cited
US3151527A
Cited
US3086505A
Cited
US3151528A
Cited
US3166053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |