US2952768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic peak level indicator system
Assignee: Individual
•
Filing: 1957-08-26
•
Granted: 1960-09-13
•
Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Herschel R Caler
- 👤 Russo Matthew
- 👤 Edward N Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102; Y10T74/2106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1854239A
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US2197312A
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US2399702A
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US2538781A
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US2536329A
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US2528344A
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US2594911A
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US2805331A
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US2824466A
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US2779869A
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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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |