US2685168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber
Assignee: Phillips Petroleum Co
•
Filing: 1948-01-02
•
Granted: 1954-08-03
•
Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
- 👤 Emil A Malick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2385833A
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US2462704A
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US2417445A
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US2493641A
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US2480147A
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US2607191A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |