US2996915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level measurement system
Assignee: Individual
•
Filing: 1959-02-12
•
Granted: 1961-08-22
•
Expires: 1979-02-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Greenwood
- 👤 Albert E Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:34
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1127084A
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US1709601A
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US2219497A
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US2357023A
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US2485579A
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US2683371A
Cited
US2766406A
Cited
US2868015A
Cited
US2787783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |