US2674128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level gauge
Assignee: Deep Rock Oil Corp
•
Filing: 1950-05-04
•
Granted: 1954-04-06
•
Expires: 1970-05-04
Abstract
No abstract record available.
Inventors
- 👤 Jon W Beam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/66; G01F23/665; G01F23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US723040A
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US771447A
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US1251679A
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US1500790A
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GB249825A
Cited
US1731377A
Cited
US2009630A
Cited
US2426930A
Cited
US2471026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |