US2488027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for catalytic conversion
Assignee: Standard Oil Co
•
Filing: 1941-01-31
•
Granted: 1949-11-15
•
Expires: 1961-01-31
Abstract
No abstract record available.
Inventors
- 👤 Jr James M Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191023045A
Cited
US1577534A
Cited
US1475502A
Cited
US2039904A
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DE533037C
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US2239801A
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US2305569A
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US2247097A
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US2264438A
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US2325136A
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US2226578A
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US2340878A
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US2331433A
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US2326705A
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US2273075A
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US2302209A
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US2360787A
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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) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |