Patent US2557018A successfully refreshed from Google Patents.
US2557018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suppression of carbon formation and carburization in gas turbine and jet propulsion engines
Assignee: Standard Oil Development Co
•
Filing: 1946-04-26
•
Granted: 1951-06-12
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Prentiss S Viles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:31
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/002; F02; F02C; F02C3/00; F02C3/20; F02C3/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1310985A
Cited
US1230924A
Cited
US2033877A
Cited
US2230817A
Cited
US2206594A
Cited
US2396911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |