Patent US3015077A successfully refreshed from Google Patents.
US3015077A
Expired / Lapsed
US
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Electrical sensing circuit
Assignee: ELECTRO PRODUCTS LAB Inc
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Filing: 1958-05-15
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Granted: 1961-12-26
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Expires: 1978-05-15
Abstract
No abstract record available.
Inventors
- 👤 David L Elam
- 👤 Paul J Keehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1573282A
Cited
GB353617A
Cited
US2234995A
Cited
US2511107A
Cited
US2386942A
Cited
US2584728A
Cited
US2550607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |