US2653623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control
Assignee: Individual
•
Filing: 1950-01-23
•
Granted: 1953-09-29
•
Expires: 1970-01-23
Abstract
No abstract record available.
Inventors
- 👤 Hippen Ralph William
- 👤 Sr Clayton Lee Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:46
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7381; Y10T137/7384; Y10T137/7407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US45437A
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US66018A
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US542900A
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US1796537A
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US1778114A
Cited
US1911785A
Cited
US2023560A
Cited
US2587401A
Cited
US2447591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |