US2708945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control circuit
Assignee: Worthington Corp
•
Filing: 1951-11-15
•
Granted: 1955-05-24
•
Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 Sylvan R Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:11
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0007; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1820981A
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US2213961A
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US2259771A
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US2391003A
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US2462019A
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US2540301A
Cited
US2511637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |