Patent US2543864A successfully refreshed from Google Patents.
US2543864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet propulsion unit with rotatab combustion chamber
Assignee: Individual
•
Filing: 1947-12-22
•
Granted: 1951-03-06
•
Expires: 1967-12-22
Abstract
No abstract record available.
Inventors
- 👤 John A Melenric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:09
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/56; F02; F02C; F02C3/00; F02C3/14; F02C3/16; F02C7/00; F02C7/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |