US2915051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tappet
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1955-07-21
•
Granted: 1959-12-01
•
Expires: 1975-07-21
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:35
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; F01L1/25; F01L1/252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734495A
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US2108514A
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US2160257A
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US2140826A
Cited
US2570853A
Cited
US2719515A
Cited
US2742031A
Cited
US2742030A
Cited
US2744509A
Cited
US2752901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |