US2989698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparison circuits
Assignee: Pye Electronic Products Ltd
•
Filing: 1957-08-06
•
Granted: 1961-06-20
•
Expires: 1977-08-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:36
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1929216A
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US2425009A
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US2838733A
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US2890331A
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US2751429A
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US2919404A
Cited
US2903581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |