US2443714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking hydrocarbon gases in the presence of finely divided coke
Assignee: Standard Oil Co
•
Filing: 1940-12-31
•
Granted: 1948-06-22
•
Expires: 1960-12-31
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Arveson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1497751A
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GB261786A
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US1977684A
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GB330934A
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US1984380A
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US2007754A
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US2073638A
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US2201306A
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US2231231A
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US2253486A
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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) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |