Patent US2665411A successfully refreshed from Google Patents.
US2665411A
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Double interpolation method and apparatus for measuring time intervals
Assignee: Hughes Tool Co
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Filing: 1951-03-15
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Granted: 1954-01-05
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Expires: 1971-03-15
Abstract
No abstract record available.
Inventors
- 👤 Jr William E Frady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
G; G04; G04F; G04F10/00; G04F10/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2504852A
Cited
US2560124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |