Patent US2750546A successfully refreshed from Google Patents.
US2750546A
Expired / Lapsed
US
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Limit responsive means for motors in servo systems and the like
Assignee: US Filter Wallace and Tiernan Inc
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Filing: 1953-03-24
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Granted: 1956-06-12
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Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 Earl L Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/66; G01N25/68; G05; G05D; G05D22/00; G05D22/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687501A
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US2376513A
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US2577483A
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US2594428A
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US2624195A
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US2633558A
Cited
US2588742A
Cited
US2603760A
Cited
US2648040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |