Patent US2503247A successfully refreshed from Google Patents.
US2503247A
Expired / Lapsed
US
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Electronic detector
Assignee: United States Department of the Interior
•
Filing: 1946-10-14
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Granted: 1950-04-11
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Expires: 1966-10-14
Abstract
No abstract record available.
Inventors
- 👤 Claude R Daum
- 👤 Cleaver Louis Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:32
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/104; G01V3/105; G01V3/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1339610A
Cited
US2033654A
Cited
US2228294A
Cited
US2315045A
Cited
US2290330A
Cited
US2321355A
Cited
US2393717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |