Patent US3480674A successfully refreshed from Google Patents.
US3500162A
Expired / Lapsed
US
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System for providing dc values representative of phase difference
Assignee: Sangamo Electric Co
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Filing: 1968-03-27
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Granted: 1970-03-10
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Expires: 1988-03-27
Abstract
No abstract record available.
Inventors
- 👤 Robert E Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:33
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/288; H02P7/2885; G; G01; G01R; G01R25/00; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/54; Y; Y10; Y10S; Y10S388/00; Y10S388/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |