Patent US2107955A successfully refreshed from Google Patents.
US2107955A
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Apparatus for liquid level and pressure control
Assignee: Phillips Petroleum Co
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Filing: 1934-01-29
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Granted: 1938-02-08
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Expires: 1954-01-29
Abstract
No abstract record available.
Inventors
- 👤 Nutter Irvin Earl
- 👤 Martin Fletcher Edward
- 👤 Gerald W Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:01
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/04; G05D16/00; G05D16/14; G05D16/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3118; Y10T137/3127; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/8593; Y10T137/86187
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) | 1941-02-07 | 1941-08-09 | 1942-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-02-07 | 1945-08-09 | 1946-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-02-07 | 1949-08-09 | 1950-02-08 | $7700.00 | Window Closed / Lapsed |