Patent US3021153A successfully refreshed from Google Patents.
Patent US2622441A successfully refreshed from Google Patents.
US2622441A
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Internal-combustion engine power analyzer
Assignee: Unisys Corp
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Filing: 1947-03-15
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Granted: 1952-12-23
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Expires: 1967-03-15
Abstract
No abstract record available.
Inventors
- 👤 Frank L Richardson
- 👤 Paul R Cronin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02; F02P17/04; F02P17/08; G; G01; G01L; G01L23/00; G01L23/22; G01L23/221; G01L23/225; G01M; G01M15/00; G01M15/04; G01M15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202900A
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US2085203A
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US2121359A
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US2319219A
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US2355363A
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US2366355A
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US2534276A
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US2392581A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |