US2928409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-magnetic electro hydraulic transfer valve
Assignee: Textron Inc
•
Filing: 1955-01-31
•
Granted: 1960-03-15
•
Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert R Johnson
- 👤 Robert J Stahl
- 👤 Glenn A Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/028; G05D16/20; G05D16/2093; G05D16/2095; Y; Y10; Y10S; Y10S60/00; Y10S60/907; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |