Patent US3310648A successfully refreshed from Google Patents.
Patent US3364943A successfully refreshed from Google Patents.
US3364943A
Expired / Lapsed
US
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Three-position fluid actuators for valves and the like
Assignee: Unisys Corp
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Filing: 1966-03-01
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Granted: 1968-01-23
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Expires: 1986-03-01
Abstract
No abstract record available.
Inventors
- 👤 Dennis B Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/18; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1435921A
Cited
US1465742A
Cited
US1954379A
Cited
FR975107A
Cited
US2699757A
Cited
US2806449A
Cited
FR1235484A
Cited
US3031853A
Cited
US3097572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |