US3561894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake charge cooling system for rotary machine
Assignee: Copeland Refrigeration Corp
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Filing: 1969-04-07
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Granted: 1971-02-09
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Expires: 1989-04-07
Abstract
Abstract AN AIR COOLED ROTARY PISTON INTERNAL COMBUSTION ENGINE. A PORTION OF THE ENGINE COOLING IS EFFECTED BY PASSING THE INDUCTION CHARGE THROUGH A HOLLOW, VANED ROTOR BEFORE INDUCTION INTO THE COMBUSTION PORTION OF THE ENGINE.
Inventors
- 👤 Robert W King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/02; F02B55/04; F02B55/06; F02M; F02M1/00; F02B53/00; F02B2053/005; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |