US2548485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber lining
Assignee: Shell Development Co
•
Filing: 1947-01-08
•
Granted: 1951-04-10
•
Expires: 1967-01-08
Abstract
No abstract record available.
Inventors
- 👤 Lubbock Isaac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:10
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08; F23M5/085; F23R; F23R3/00; F23R3/007; Y; Y10; Y10S; Y10S60/00; Y10S60/909; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US792667A
Cited
US1757698A
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US2092537A
Cited
US2183313A
Cited
US2186740A
Cited
US2348754A
Cited
US2451146A
Cited
US2468902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |