Patent US3190840A successfully refreshed from Google Patents.
US3190840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a chromium oxide and alpha-alumina catalyst composition and the product thereof
Assignee: Individual
•
Filing: 1960-08-09
•
Granted: 1965-06-22
•
Expires: 1980-08-09
Abstract
No abstract record available.
Inventors
- 👤 Biais Regine
- 👤 Papee Denis
- 👤 Gauguin Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J21/00; B01J21/16; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A DEHYDROGENATION CATALYST FOR HYDROCARBONS WHICH CONSIST ESSENTIALLY OF THE CALCINED COMBINATION IN THE FORM OF AN ALPHA-SOLID SOLUTION OF ALUMINUM OXIDE CONTAINING AT EAST 10% BY WEIGHT OF THE ALPHA MODIFICATION OF ALUMINUM OVIDE AND 2-25% BY WEIGHT CALCULATED AS CHROMIUM SESQUIOXIDE OF A CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE AND COMPOUNDS OF CHROMIUM CAPABLE OF THERMAL DECOMPOSITION TO CHROMIUM OXIDE, SAID CATALYST BEING CHARATERIZED BY A RHOMBIC FORM HAVING A SPECIFIC SURFACE LESS THAN 50 M.2/PER GRAM.
Claim 2
Dependent Claim
83 words
A DEHYDROGENATION CATALYST FOR HYDROCARBONS WHICH CONSIST ESSENTIALLY OF THE CALCINED COMBINATION IN THE FORM OF AN ALPHA-SOLID SOLUTION OF ALUMINUM OXIDE CONTAINING AT EAST 10% BY WEIGHT OF THE ALPHA MODIFICATION OF ALUMINUM OVIDE AND 2-25% BY WEIGHT CALCULATED AS CHROMIUM SESQUIOXIDE OF A CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE AND COMPOUNDS OF CHROMIUM CAPABLE OF THERMAL DECOMPOSITION TO CHROMIUM OXIDE, SAID CATALYST BEING CHARATERIZED BY A RHOMBIC FORM HAVING A SPECIFIC SURFACE LESS THAN 50 M.2/PER GRAM.
Claim 3
Independent Claim
87 words
A METHOD FOR PREPARING A DEHYDROGENATION CATALYST FOR HYDROCARBONS WHICH COMPRISES COMBINING ALUMINUM OXIDE CONTAINING AT LEAST 10% BY WEIGHT OF THE ALPHA MODIFICATION OF ALUMINUM OXIDE WITH A CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE AND COMPOUNDS OF CHROMIUM CAPABLE OF THERMAL DECOMPOSITION TO CHROMIUM OXIDE, AND CALCING THE COMBINATION AT A TEMPERATURE WITHIN THE RANGE OF 700950*C. TO FORM DIRECTLY AN ALPHA SOLID SOLUTION OF ALUMINUM OXIDE AND CHROMIUM OXIDE IN RHOMBIC FORM HAVING A SPECIFIC SURFACE LESS THAN 50 M.2/PER GRAM.
Claim 4
Independent Claim
87 words
A METHOD FOR PREPARING A DEHYDROGENATION CATALYST FOR HYDROCARBONS WHICH COMPRISES COMBINING ALUMINUM OXIDE CONTAINING AT LEAST 10% BY WEIGHT OF THE ALPHA MODIFICATION OF ALUMINUM OXIDE WITH A CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE AND COMPOUNDS OF CHROMIUM CAPABLE OF THERMAL DECOMPOSITION TO CHROMIUM OXIDE, AND CALCING THE COMBINATION AT A TEMPERATURE WITHIN THE RANGE OF 700950*C. TO FORM DIRECTLY AN ALPHA SOLID SOLUTION OF ALUMINUM OXIDE AND CHROMIUM OXIDE IN RHOMBIC FORM HAVING A SPECIFIC SURFACE LESS THAN 50 M.2/PER GRAM.
References Cited (Backward Citations)
US2311979A
Cited
GB570551A
Cited
US2454227A
Cited
US2826620A
Cited
US3032514A
Cited
US3068303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |