US2718443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine piston
Assignee: Individual
•
Filing: 1952-07-01
•
Granted: 1955-09-20
•
Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert F Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1535069A
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US1681494A
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US1469656A
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US1990393A
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US2108194A
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US2110316A
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US2159989A
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US2257236A
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US2599851A
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US2410895A
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US2638391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |