Patent US2518082A successfully refreshed from Google Patents.
US2518082A
Expired / Lapsed
US
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Auxiliary air admission device for internal-combustion engines
Assignee: Individual
•
Filing: 1945-05-26
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Granted: 1950-08-08
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Expires: 1965-05-26
Abstract
No abstract record available.
Inventors
- 👤 Roy H Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:15
CPC Classifications
F; F02; F02M; F02M21/00; F02M2700/00; F02M2700/13; F02M2700/1305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1177831A
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US1211636A
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US1551927A
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US1474686A
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US1942187A
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US2158819A
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US2260408A
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US2326598A
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US2377088A
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US2421580A
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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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |