US2441797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure mechanism
Assignee: Individual
•
Filing: 1943-07-09
•
Granted: 1948-05-18
•
Expires: 1963-07-09
Abstract
No abstract record available.
Inventors
- 👤 Orson A Carnahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
F; F01; F01B; F01B15/00; F01B15/04; F01B15/06; F01B15/065; F01B1/00; F01B1/06; F01B1/0641; F01B1/0658; F04; F04B; F04B23/00; F04B23/04; F04B23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US439792A
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US1239059A
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US1416314A
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US1557434A
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GB261984A
Cited
US1990263A
Cited
US2013478A
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GB466180A
Cited
US2151402A
Cited
US2347663A
Cited
US2307374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |