Patent US2638877A successfully refreshed from Google Patents.
US2638877A
Expired / Lapsed
US
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Fluid motor
Assignee: OHIO INJECTOR CO
•
Filing: 1949-11-08
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Granted: 1953-05-19
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Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Frank R Emig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US350763A
Cited
US450223A
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US551024A
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US574415A
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US1709167A
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US997500A
Cited
US995900A
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US1230328A
Cited
US1348800A
Cited
US2073405A
Cited
US2268898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |