Patent US2443714A successfully refreshed from Google Patents.
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
2026-11-04 06:07
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1497751A
Cited
GB261786A
Cited
US1977684A
Cited
GB330934A
Cited
US1984380A
Cited
US2007754A
Cited
US2073638A
Cited
US2201306A
Cited
US2231231A
Cited
US2253486A
Cited
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 |