US2943296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic apparatus for measuring the level of stored materials
Assignee: Raytheon Co
•
Filing: 1955-08-09
•
Granted: 1960-06-28
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert A Fryklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:23
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2962; Y; Y10; Y10S; Y10S367/00; Y10S367/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1217585A
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US1677943A
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US2098287A
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US2228024A
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US2605416A
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US2584128A
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US2617874A
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US2767385A
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US2710787A
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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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |