Patent US2838445A successfully refreshed from Google Patents.
US2838445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reforming process and catalyst
Assignee: Engelhard Industries Inc
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Filing: 1956-04-27
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Granted: 1958-06-10
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Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Teter Ruth Young
- 👤 Carl D Keith
- 👤 John L Gring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:43
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J21/04; B01J2229/00; B01J2229/30; B01J2229/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A CATALYST HAVING REFORMING ACTIVITY AND ESSENTIALLY COMPRISING CALCINED ALUMINA AND PLATINUM METAL HAVING REFORMING ACTIVITY, WHICH CATALYST IS CHARACTERIZED BY LARGE PORE BASE STRUCTURE ESSENTIALLY COMPOSED OF GAMMA-ALUMINA MODIFICATIONS RESULTING FROM THE DRYING AND CALCINATION OF A MIXTURE OF PRECURSOR HYDROUS ALUMINA PHASES CONTAINING FROM ABOUT 65 TO ABOUT 95% OF TRIHYDRATE, SAID CATALYST CONTAINING FROM ABOUT 0.1% TO ABOUT 1.5% BY WEIGHT OF A PLATINUM METAL, SAID PLATINUM METAL BEING PRESENT IN SUFFICIENTLY FINELY DIVIDED FORM AS TO EXHIBIT BY X-RAY DIFFRACTION STUDIES, THE SUBSTANATIAL ABSENCE OF CRYSTALLITES AND CRUSTALS OF SIZE LARGER THAN ABOUT 50 ANGSTROM UNITS, THE CONDITIONS OF CALCINING SERVING TO SINTER THE CATALYST SO THAT AFTER CALCINING AND BEFOR USE IS HAS SUBSTANTIALLY NO PORES SMALLER THAN ABOUT 10 ANGSTROM UNITS RADIUS AND A SURFACE AREA OF LESS THAN ABOUT 350 SQUARE METERS PER GRAM.
Claim 2
Dependent Claim
141 words
A CATALYST HAVING REFORMING ACTIVITY AND ESSENTIALLY COMPRISING CALCINED ALUMINA AND PLATINUM METAL HAVING REFORMING ACTIVITY, WHICH CATALYST IS CHARACTERIZED BY LARGE PORE BASE STRUCTURE ESSENTIALLY COMPOSED OF GAMMA-ALUMINA MODIFICATIONS RESULTING FROM THE DRYING AND CALCINATION OF A MIXTURE OF PRECURSOR HYDROUS ALUMINA PHASES CONTAINING FROM ABOUT 65 TO ABOUT 95% OF TRIHYDRATE, SAID CATALYST CONTAINING FROM ABOUT 0.1% TO ABOUT 1.5% BY WEIGHT OF A PLATINUM METAL, SAID PLATINUM METAL BEING PRESENT IN SUFFICIENTLY FINELY DIVIDED FORM AS TO EXHIBIT BY X-RAY DIFFRACTION STUDIES, THE SUBSTANATIAL ABSENCE OF CRYSTALLITES AND CRUSTALS OF SIZE LARGER THAN ABOUT 50 ANGSTROM UNITS, THE CONDITIONS OF CALCINING SERVING TO SINTER THE CATALYST SO THAT AFTER CALCINING AND BEFOR USE IS HAS SUBSTANTIALLY NO PORES SMALLER THAN ABOUT 10 ANGSTROM UNITS RADIUS AND A SURFACE AREA OF LESS THAN ABOUT 350 SQUARE METERS PER GRAM.
Claim 3
Dependent Claim
40 words
THE PROCESS OF REFORMING LIGHT HYDROCARBON STOCKS TO PRODUCE GASOLINE, BENZENE AND OTHER SELECTED AROMATICS, WHICH COMPRISES CONTACTING THE HYDROCARBON STOCK UNDER REFORMING CONDITIONS OF TEMPERATURE, PRESSURE AND HYDROGEN PARTIAL PRESSURE WITH A REFORMING CATALYST AS DEFINED IN CLAIM 1.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |