Patent US4996488A successfully refreshed from Google Patents.
Patent US2789662A successfully refreshed from Google Patents.
US2789662A
Expired / Lapsed
US
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Air intake device for engines
Assignee: Motors Liquidation Co
•
Filing: 1952-04-23
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Granted: 1957-04-23
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Expires: 1972-04-23
Abstract
Abstract 725,363. Intake silencers. GENERAL MOTORS CORPORATION. April 14, 1953 [April 23, 1952], No. 10110/53. Class 7 (2) [Also in Group XXVIII] Resonance chambers 18, 19, 27 of a combined air intake filter (see Group XXVIII) and silencer unit 10 suitable for use on carburetters are located coaxially of a central clean air outlet 16 and sound waves gain access to said chambers 18, 19, 27 through an annular passage 17 formed by walls 13, 14, apertures 34 in the wall 14 and apertures 36 in the base 37 of the chamber 27 which is closed at its upper end by the cover 39 of the unit and is lined with sound absorbing material.
Inventors
- 👤 Wesley W Mcmullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:07
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/14; F02M35/12; F02M35/1255; F02M35/1266; Y; Y10; Y10S; Y10S55/00; Y10S55/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898027A
Cited
US1909511A
Cited
US2325352A
Cited
US2063743A
Cited
US2271055A
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US2064207A
Cited
US2149836A
Cited
US2385814A
Cited
US2114783A
Cited
US2170902A
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US2235539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |