Patent US3057544A successfully refreshed from Google Patents.
US3057544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine or machine with at least one rotating piston running in an annular cylinder space
Assignee: Individual
•
Filing: 1959-04-28
•
Granted: 1962-10-09
•
Expires: 1979-04-28
Abstract
No abstract record available.
Inventors
- 👤 Rohsmann Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:03
CPC Classifications
F; F01; F01C; F01C3/00; F01C3/02; F01C1/00; F01C1/30; F01C1/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1467944A
Cited
US1101329A
Cited
US1136976A
Cited
US1580808A
Cited
FR596888A
Cited
GB269617A
Cited
US1831263A
Cited
FR1149144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |