Patent US2391068A successfully refreshed from Google Patents.
US2391068A
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Fluid pressure electrical switch
Assignee: Phillips Petroleum Co
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Filing: 1943-07-29
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Granted: 1945-12-18
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Expires: 1963-07-29
Abstract
No abstract record available.
Inventors
- 👤 Nye J Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:10
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/56; H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; H01H36/00; H01H36/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-12-17 | 1949-06-18 | 1949-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-17 | 1953-06-18 | 1953-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-17 | 1957-06-18 | 1957-12-18 | $7700.00 | Window Closed / Lapsed |