US2602837A
Expired / Lapsed
US
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Means for measuring instantaneous rotational speed variations
Assignee: Ohmega Laboratories
•
Filing: 1949-10-22
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Granted: 1952-07-08
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Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 Harry R Foster
- 👤 Elmo E Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:40
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/487; G01P3/4802; G01P3/56; G01P3/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1804156A
Cited
US2337328A
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US2419527A
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US2411595A
Cited
US2496103A
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US2475742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |