US2438467A
Expired / Lapsed
US
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Catalytic conversion of hydrocarbons
Assignee: Standard Oil Development Co
•
Filing: 1943-01-16
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Granted: 1948-03-23
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Expires: 1963-01-16
Abstract
No abstract record available.
Inventors
- 👤 Charles W Tyson
- 👤 Herbert G M Fischer
- 👤 Eger V Murphree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:36
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0492; B01J38/00; B01J38/04; B01J38/12; B01J8/0446; B01J8/0449; B01J8/0453; B01J8/0476; B01J8/048; B01J8/0488; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB357956A
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US1989692A
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US2006552A
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US2276249A
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US2081348A
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US2143949A
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US2167602A
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US2239801A
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US2265964A
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US2290580A
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US2278509A
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US2295752A
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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) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |