US2929362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential hydraulic valve
Assignee: Lockheed Martin Corp
•
Filing: 1954-08-26
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Granted: 1960-03-22
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Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 Paul F Hayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0055; G05D1/0061; B; B64; B64C; B64C13/00; B64C13/24; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US991950A
Cited
FR612163A
Cited
US2396951A
Cited
US2486816A
Cited
US2579028A
Cited
US2678177A
Cited
US2773660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |