US3039059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparator circuit having integrating and differentiating input means
Assignee: AT&T Inc
•
Filing: 1957-12-10
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Granted: 1962-06-12
•
Expires: 1977-12-10
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2499534A
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US2493648A
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US2589833A
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US2634346A
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US2579473A
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US2609501A
Cited
US2837642A
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US2782355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |