US2628500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining liquid levels
Assignee: Standard Oil Development Co
•
Filing: 1948-09-16
•
Granted: 1953-02-17
•
Expires: 1968-09-16
Abstract
No abstract record available.
Inventors
- 👤 Russell R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:41
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US337910A
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US1466359A
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US1567758A
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US1733616A
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US1902276A
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US2158785A
Cited
US2187210A
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US2525807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |