US2773837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina-chromia-phosphorus pentoxide catalyst and method for preparing the same
Assignee: ExxonMobil Oil Corp
•
Filing: 1953-09-30
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Granted: 1956-12-11
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Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Carlos L Gutzelt
- 👤 William H Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:54
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A CATALYTIC COMPOSITE CONSISTING ESSENTIALLY OF 20 TO 40 PERCENT BY WEIGHT OF CHROMIA, 50 TO 80 PERCENT BY WEIGHT ALUMINA, AND 0.2 TO 10 PERCENT BY WEIGHT OF PHOSPHOROUS PENTOXIDE, WHEREIN THE CHROMIA AND ALUMINA COM-
Claim 2
Dependent Claim
37 words
A CATALYTIC COMPOSITE CONSISTING ESSENTIALLY OF 20 TO 40 PERCENT BY WEIGHT OF CHROMIA, 50 TO 80 PERCENT BY WEIGHT ALUMINA, AND 0.2 TO 10 PERCENT BY WEIGHT OF PHOSPHOROUS PENTOXIDE, WHEREIN THE CHROMIA AND ALUMINA COM-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |