US2584446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level gauge
Assignee: ROCHESTER Manufacturing Co
•
Filing: 1948-07-01
•
Granted: 1952-02-05
•
Expires: 1968-07-01
Abstract
No abstract record available.
Inventors
- 👤 Warren W Hastings
- 👤 Reidar A Tollefsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/34; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH9754A
Cited
US1072122A
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FR465798A
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US1396655A
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US1634165A
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US1920971A
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US1971610A
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US1922362A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |