Patent US2817971A successfully refreshed from Google Patents.
US2817971A
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Recording system for rotor unbalance measuring apparatus
Assignee: Tinius Olsen Testing Machine Co
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Filing: 1955-02-21
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Granted: 1957-12-31
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Warren M Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:54
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1888268A
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US2142251A
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US2126025A
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US2243379A
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US2313752A
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US2331733A
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US2672598A
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US2783648A
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US2726130A
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US2701748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |