US2488031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion system
Assignee: Standard Oil Co
•
Filing: 1941-07-03
•
Granted: 1949-11-15
•
Expires: 1961-07-03
Abstract
No abstract record available.
Inventors
- 👤 Robert C Gunness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1799858A
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US2039904A
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US1845058A
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DE533037C
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US1983943A
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US1984380A
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US2231424A
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US2231231A
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US2264438A
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US2253486A
Cited
US2248196A
Cited
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 |