Patent US2420049A successfully refreshed from Google Patents.
US2420049A
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Catalytic hydrocarbon conversion starting up procedure
Assignee: Standard Oil Development Co
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Filing: 1943-12-31
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Granted: 1947-05-06
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Expires: 1963-12-31
Abstract
No abstract record available.
Inventors
- 👤 Homer Z Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:51
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1809; B01J8/005; B01J8/0075; B01J8/24; B01J8/26; B01J2208/00; B01J2208/00008; B01J2208/00716
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266095A
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US2266033A
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US2325516A
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US2339846A
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US2330462A
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US2337684A
Cited
US2327175A
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US2361978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |