US3715178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doweling construction for rotary engine housing
Assignee: John Deere Technologies International Inc
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Filing: 1971-11-30
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Granted: 1973-02-06
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Expires: 1991-11-30
Abstract
Abstract A ROTARY ENGINE HOUSING HAVING A LOCATING AND POSITIONING DOWEL STRUCTURE, COMPRISING A PLURALITY OF HOLLOW, LIQUID COOLED DOWEL MEMBERS WITH COAXIAL TIE BOLTS, THE DOWEL MEMBERS HAVING THEIR ENDS RIGIDLY SUPPORTED AND BEING SUPPORTED AT OTHER STRESS POINTS GENERATED BY THERMAL MOVEMENT AND HIGH PRESSURE, IN SUCH A MANNER THAT DEFLECTIONS AND DISTORTIONS ARE OBVIATED.
Inventors
- 👤 C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:29
CPC Classifications
F; F02; F02B; F02B53/00; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |