Patent US2448983A successfully refreshed from Google Patents.
US2448983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cylinder
Assignee: Fairchild Engine and Airplane Corp
•
Filing: 1944-05-02
•
Granted: 1948-09-07
•
Expires: 1964-05-02
Abstract
No abstract record available.
Inventors
- 👤 Johnson Halex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:44
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US368837A
Cited
US1157335A
Cited
US1283800A
Cited
US1157323A
Cited
US1267253A
Cited
US1274812A
Cited
US1328276A
Cited
US1762370A
Cited
US2351020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |