US2837896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic or pneumatic bi-directional impulse motor
Assignee: Northrop Grumman Corp
•
Filing: 1955-04-22
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Granted: 1958-06-10
•
Expires: 1975-04-22
Abstract
No abstract record available.
Inventors
- 👤 George W Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:16
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/04; F01B3/06; F01B3/08; F01L; F01L25/00; F01L25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2597420A
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US2694994A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |