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US3397680A
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US
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Reversing blade rotary engine
Assignee: Individual
•
Filing: 1966-04-19
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Granted: 1968-08-20
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Expires: 1986-04-19
Abstract
No abstract record available.
Inventors
- 👤 Joel B Guin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:51
CPC Classifications
F; F02; F02B; F02B53/00; F02B2730/00; F02B2730/03; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308352A
Cited
US1224642A
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US1233579A
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US1163142A
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US3227090A
Cited
US3203405A
Cited
US3302625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |