US3451345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression-depression machine having rotary pistons
Assignee: JEAN FRANCOIS GEORGES ROY
•
Filing: 1967-11-21
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Granted: 1969-06-24
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Expires: 1987-11-21
Abstract
No abstract record available.
Inventors
- 👤 Jean-Francois Georges Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:19
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/12; F01C1/126; F01C1/24; F01C1/28; F01C11/00; F01C11/002; F01C11/004; F02; F02B; F02B53/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US685775A
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US1953695A
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US2097881A
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US2698130A
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US2845909A
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US2939628A
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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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |