Patent US3359957A successfully refreshed from Google Patents.
US3359957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four cylinder two-stroke opposing piston internal combustion engine
Assignee: Individual
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Filing: 1966-10-31
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Granted: 1967-12-26
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Mantzel Albrecht-Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:53
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F01; F01B; F01B7/00; F01B7/02; F01B7/14; F02B75/02; F02B2075/022; F02B2075/025; F02B73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A FOUR CYLINDER TWO-STROKE OPPOSING PISTON INTERNAL COMBUSTION ENGINE HAVING FOUR PARALLEL ARRANGED CRANKSHAFTS ARRANGED ABOUT A CENTRAL AXIS, INCLUDING A FIRST TWO OPPOSITE CRANKSHAFTS BEING CLOSER TOGETHER THAN THE SECOND TWO OPPOSITE CRANKSHAFTS, TWO PISTONS ACTING ON EACH CRANKSHAFT AND THE CYLINDERS OF WHICH ARE ARANGED AT AN ANGLE TO ONE ANOTHER, CHARACTERISED BY THE FACT THAT THE ANGLE BETWEEN THE TWO CYLINDERS ASSOCIATED WITH THE SAID FIRST TWO OPPOSITE CRANKSHAFTS BEING GREATER THAN 90* AND THE ANGLE BETWEEN THE TWO CYLINDERS ASSOCIATED WITH THE SAID SECOND TWO OPPOSITE CRANKSHAFTS BEING LESS THAN 90*
Claim 2
Dependent Claim
95 words
A FOUR CYLINDER TWO-STROKE OPPOSING PISTON INTERNAL COMBUSTION ENGINE HAVING FOUR PARALLEL ARRANGED CRANKSHAFTS ARRANGED ABOUT A CENTRAL AXIS, INCLUDING A FIRST TWO OPPOSITE CRANKSHAFTS BEING CLOSER TOGETHER THAN THE SECOND TWO OPPOSITE CRANKSHAFTS, TWO PISTONS ACTING ON EACH CRANKSHAFT AND THE CYLINDERS OF WHICH ARE ARANGED AT AN ANGLE TO ONE ANOTHER, CHARACTERISED BY THE FACT THAT THE ANGLE BETWEEN THE TWO CYLINDERS ASSOCIATED WITH THE SAID FIRST TWO OPPOSITE CRANKSHAFTS BEING GREATER THAN 90* AND THE ANGLE BETWEEN THE TWO CYLINDERS ASSOCIATED WITH THE SAID SECOND TWO OPPOSITE CRANKSHAFTS BEING LESS THAN 90*
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |