Patent US3444556A successfully refreshed from Google Patents.
US3444556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic phase-difference counter-circuit
Assignee: General Electric Co
•
Filing: 1967-12-15
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Granted: 1969-05-13
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Expires: 1987-12-15
Abstract
No abstract record available.
Inventors
- 👤 James E Bellinger
- 👤 Robert F Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:04
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/36; G01S13/50; G01S13/58; G01S13/585; G01S13/586; G01S13/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3217258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |