Patent US3301236A successfully refreshed from Google Patents.
US3301236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve internal combustion engine
Assignee: Individual
•
Filing: 1964-10-05
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Granted: 1967-01-31
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Bratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:36
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F01; F01L; F01L7/00; F01L7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
IN AN INTERNAL COMBUSTION ENGINE A CYLINDER, MEANS DEFINING A PAIR OF PORTS IN COMMUNICATION WITH SAID CYLINDER AT ONE END OF SAID CYLINDER AND AT THE SIDE THEREOF WHICH PORTS ARE ADJACENT EACH OTHER AND ARE DISPOSED IN THE SAME SURFACE OF REVOLUTION, A ROTARY VALVE HAVING A PORT THEREIN REGISTRABLE SEQUENTIALLY WITH SAID PAIR OF PORTS, AN ELONGATED ROTARY BEARING INTERMEDIATE SAID PAIR OF PORTS ENGAGEABLE WITH SAID VALVE ON THE SIDE THEREOF AWAY FROM THE CYLINDER AND A PISTON RECIPROCAL WITHIN THE CYLINDER.
Claim 2
Dependent Claim
86 words
IN AN INTERNAL COMBUSTION ENGINE A CYLINDER, MEANS DEFINING A PAIR OF PORTS IN COMMUNICATION WITH SAID CYLINDER AT ONE END OF SAID CYLINDER AND AT THE SIDE THEREOF WHICH PORTS ARE ADJACENT EACH OTHER AND ARE DISPOSED IN THE SAME SURFACE OF REVOLUTION, A ROTARY VALVE HAVING A PORT THEREIN REGISTRABLE SEQUENTIALLY WITH SAID PAIR OF PORTS, AN ELONGATED ROTARY BEARING INTERMEDIATE SAID PAIR OF PORTS ENGAGEABLE WITH SAID VALVE ON THE SIDE THEREOF AWAY FROM THE CYLINDER AND A PISTON RECIPROCAL WITHIN THE CYLINDER.
Claim 3
Dependent Claim
49 words
IN AN INTERNAL COMBUSTION ENGINE A CYLINDER, MEANS DEFINING A PAIR OF PORTS AT ONE END OF THE CYLINDER IN THE SAME SURFACE OF REVOLUTION, A PISTON RECIPROCALLY MOUNTED IN THE CYLINDER AND A ROTARY VALVE DISC HAVING A PORT THEREIN REGISTRABLE SEQUENTIALLY WITH SAID PAIR OF PORTS ON
Claim 4
Dependent Claim
49 words
IN AN INTERNAL COMBUSTION ENGINE A CYLINDER, MEANS DEFINING A PAIR OF PORTS AT ONE END OF THE CYLINDER IN THE SAME SURFACE OF REVOLUTION, A PISTON RECIPROCALLY MOUNTED IN THE CYLINDER AND A ROTARY VALVE DISC HAVING A PORT THEREIN REGISTRABLE SEQUENTIALLY WITH SAID PAIR OF PORTS ON
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |