US2431920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic treatment of sulfurbearing hydrocarbon distillates
Assignee: Shell Development Co
•
Filing: 1944-12-21
•
Granted: 1947-12-02
•
Expires: 1964-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert M Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:40
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2183591A
Cited
GB418926A
Cited
US2025255A
Cited
US2167602A
Cited
US2273298A
Cited
US2273299A
Cited
US2232909A
Cited
US2325034A
Cited
US2315530A
Cited
US2316092A
Cited
US2370707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |