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US3444820A
Expired / Lapsed
US
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Machine usable as a rotary pump or a heat engine
Assignee: Individual
•
Filing: 1967-05-17
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Granted: 1969-05-20
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Expires: 1987-05-17
Abstract
No abstract record available.
Inventors
- 👤 Seiji Yamane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:15
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/30; F01C1/40; F01C1/46; F02; F02B; F02B53/00; F02B2730/00; F02B2730/01; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1424977A
Cited
US1787708A
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US2212717A
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US2198382A
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US2588342A
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US2832199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |