US2432634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking hydrocarbon oil with silica-magnesia catalyst
Assignee: Universal Oil Products Co
•
Filing: 1939-08-14
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Granted: 1947-12-16
•
Expires: 1959-08-14
Abstract
No abstract record available.
Inventors
- 👤 Charles L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:42
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1840450A
Cited
US1728732A
Cited
FR820917A
Cited
GB484368A
Cited
GB504614A
Cited
US2283172A
Cited
US2229353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |