Patent US2918625A successfully refreshed from Google Patents.
US2918625A
Expired / Lapsed
US
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Ultra low frequency phase meter
Assignee: ACTON LAB Inc
•
Filing: 1954-05-10
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Granted: 1959-12-22
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Richard W Houghton
- 👤 Jr Robert E Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2461456A
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US2414107A
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US2411573A
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US2514309A
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US2513477A
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US2545082A
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US2666848A
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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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |