Patent US1951218A successfully refreshed from Google Patents.
US1951218A
Expired / Lapsed
US
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Tester for high frequency oscillating current
Assignee: Individual
•
Filing: 1933-05-16
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Granted: 1934-03-13
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Expires: 1953-05-16
Abstract
No abstract record available.
Inventors
- 👤 Graham G Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-03-12 | 1937-09-11 | 1938-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-12 | 1941-09-11 | 1942-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-12 | 1945-09-11 | 1946-03-13 | $7700.00 | Window Closed / Lapsed |