Patent US3474255A successfully refreshed from Google Patents.
US3474255A
Expired / Lapsed
US
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Means to detect amount and direction of shaft rotation
Assignee: Optomechanisms Inc
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Filing: 1966-04-11
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Granted: 1969-10-21
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:47
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/02; G01P13/04; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/344; G01D5/345; G01N; G01N21/00; G01N21/17; G01N21/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165974A
Cited
US2167484A
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US2313923A
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US2565213A
Cited
US3054204A
Cited
GB1002616A
Cited
US3306159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |