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US3015167A
Expired / Lapsed
US
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Liquid level
Assignee: Individual
•
Filing: 1957-12-18
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Granted: 1962-01-02
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Expires: 1977-12-18
Abstract
No abstract record available.
Inventors
- 👤 James M Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:46
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US532949A
Cited
US914945A
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US965659A
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US1566174A
Cited
FR793463A
Cited
US2382525A
Cited
US2804692A
Cited
US2814127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |