US2547392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous contact internal rotor for engines
Assignee: Individual
•
Filing: 1946-04-02
•
Granted: 1951-04-03
•
Expires: 1966-04-02
Abstract
No abstract record available.
Inventors
- 👤 Myron F Hill
- 👤 Francis A Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/10; F01C1/103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21316E
Cited
US1682565A
Cited
US1682563A
Cited
US1798059A
Cited
US1682564A
Cited
US1538328A
Cited
US1646615A
Cited
US2031888A
Cited
US1972565A
Cited
US1927799A
Cited
US2091317A
Cited
US2209201A
Cited
US2209202A
Cited
US2386896A
Cited
US2336479A
Cited
US2389728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |