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US3176667A
Expired / Lapsed
US
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Piston engine
Assignee: Individual
•
Filing: 1962-10-22
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Granted: 1965-04-06
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hammer Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:23
CPC Classifications
F; F02; F02B; F02B53/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2730/00; F02B2730/01; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PISTON ENGINE COMPRISING A CASING, FIRST AND SECOND HOLLOW MEMBERS HAVING SPHERICAL SURFACES ARRANGED ONE WITHIN THE OTHER, AT LEAST TWO DIAMETRICALLY OPPOSITE PISTON CHAMBERS DEFINED BY SPHERICAL SURFACES OF SAID FIRST AND SECOND HOLLOW MEMBERS, A PISTON IN EACH CHAMBER, MEANS DEFINING A PATH OF ROTATION OF SAID PISTONS INCLINED RELATIVE
Claim 2
Dependent Claim
53 words
A PISTON ENGINE COMPRISING A CASING, FIRST AND SECOND HOLLOW MEMBERS HAVING SPHERICAL SURFACES ARRANGED ONE WITHIN THE OTHER, AT LEAST TWO DIAMETRICALLY OPPOSITE PISTON CHAMBERS DEFINED BY SPHERICAL SURFACES OF SAID FIRST AND SECOND HOLLOW MEMBERS, A PISTON IN EACH CHAMBER, MEANS DEFINING A PATH OF ROTATION OF SAID PISTONS INCLINED RELATIVE
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |