US3377556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft speed detector with variable capacitive coupling between the shaft and an electrical signal generator
Assignee: Beckman and Whitley Inc
•
Filing: 1967-01-30
•
Granted: 1968-04-09
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Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 John W Corcoran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/483; G01P3/4802; G01P5/00; G01P5/02; G01P5/06; G01P5/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE533061A
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US1600842A
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US2548790A
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US2455345A
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US2674729A
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CH326602A
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US3146394A
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US3121839A
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US3296522A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |