US2477042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat exchange in fluidized hydrocarbon conversion systems
Assignee: Standard Oil Development Co
•
Filing: 1943-03-10
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Granted: 1949-07-26
•
Expires: 1963-03-10
Abstract
No abstract record available.
Inventors
- 👤 Harvey E W Burnside
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:28
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1688325A
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US1840857A
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US1877322A
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US2201552A
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US2311984A
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US2302209A
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US2360463A
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US2373008A
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US2348009A
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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) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |