US2728070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level tester
Assignee: Individual
•
Filing: 1952-12-04
•
Granted: 1955-12-20
•
Expires: 1972-12-04
Abstract
No abstract record available.
Inventors
- 👤 William D Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18; G01F23/185; F; F01; F01M; F01M11/00; F01M11/10; F01M11/12; F16; F16N; F16N19/00; F16N19/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566338A
Cited
US1677494A
Cited
FR662939A
Cited
FR804280A
Cited
US2141325A
Cited
US2334220A
Cited
US2588761A
Cited
US2626386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |