US3245920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst composition consisting of a noble metal on alumina
Assignee: Engelhard Industries Inc
•
Filing: 1962-08-17
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Granted: 1966-04-12
•
Expires: 1982-08-17
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
- 👤 Paula M Kenah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J21/00; B01J21/02; B01J21/04; B01J21/16; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A CATALYST CONSISTING ESSENTIALLY OF A PLATINUM GROUP METAL IN THE FORM OF CRYSTALLITES SUPPORTED ON THE SUPERIFICAL SURFACE OF A PARTIALLY SINTERED, LOW AREA ALUMINA, THE CRYSTALLITES HAVING SIZE WITHIN THE RANGE OF ABOUT 500900 ANGSTROM UNITS AS DETERMINED BY X-RAY DIFFRACTION MEASUREMENT, THE ALUMINA HAVING A MATERIAL QUANTITY OF ITS NORMALLY ACCESSIBLE PORES IN THE ACTIVATED STATE COLLAPSED DUE TO THE SINTERING.
Claim 2
Dependent Claim
64 words
A CATALYST CONSISTING ESSENTIALLY OF A PLATINUM GROUP METAL IN THE FORM OF CRYSTALLITES SUPPORTED ON THE SUPERIFICAL SURFACE OF A PARTIALLY SINTERED, LOW AREA ALUMINA, THE CRYSTALLITES HAVING SIZE WITHIN THE RANGE OF ABOUT 500900 ANGSTROM UNITS AS DETERMINED BY X-RAY DIFFRACTION MEASUREMENT, THE ALUMINA HAVING A MATERIAL QUANTITY OF ITS NORMALLY ACCESSIBLE PORES IN THE ACTIVATED STATE COLLAPSED DUE TO THE SINTERING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |