US2843144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level device
Assignee: Phillips Petroleum Co
•
Filing: 1955-04-14
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Granted: 1958-07-15
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Expires: 1975-04-14
Abstract
No abstract record available.
Inventors
- 👤 Lorne M Robinson
- 👤 Verdus L Hining
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:12
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/161; G01F23/164; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/2921; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/7287; Y10T137/7313; Y10T137/7339; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |