US3126755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston engine
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:07
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/102; F02; F02B; F02B53/00; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S451/00; Y10S451/919; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A METHOD OF MANUFACTURING AN OUTER ROTARY TOOTHED PISTON HAVING A CYLINDRICAL WALL AND INDIVIDUAL TOOTH SEGMENTS MOUNTED CIRCUMFERENTIALLY IN ABUTTING RELATION IN SAID WALL EACH FORMED WITH A CONVEX GUIDING SURFACE FACING RADIALLY INWARDLY, THE STEPS OF GRINDING THE ABUTTING AND GUIDING SURFACES OF SAID TEETH BY PROFILE DISKS AND OF INSERTING SAID SEGMENTS INTO SAID CYLINDRICAL WALL UNDER
References Cited (Backward Citations)
US1341846A
Cited
US1486340A
Cited
US1505707A
Cited
GB305665A
Cited
US1989652A
Cited
US2721541A
Cited
US2740386A
Cited
US2762339A
Cited
US2753810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |