US3331787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing an oxidation catalyst
Assignee: Engelhard Industries Inc
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Filing: 1966-02-15
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Granted: 1967-07-18
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Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
- 👤 Paula M Kenah
- 👤 Daniel L Bair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/0201; B01J37/0207; B01J37/024; B01J37/0244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR PREPARING A CTALYST WHICH COMPRISES FORMING AN AQUEOUS DISPERSION OF CALCINED CATALYTICALLY ACTIVE REFRACTORY METAL OXIDE AND A PLATINUM GROUP METAL COMPOUND, SAID REFRACTORY METAL OXIDE HAVING BEEN COMBINED AS AN AQUEOUS DISPERSION WITH A WATER-SOLUBLE PLATINUM GROUP METAL COMPOUND, APPLYING SAID FORMED DISPERSION TO THE EXTERNAL SURFACES OF A CHEMICALLY INERT SUBSTANTIALLY CATALYTICALLY INACTIVE REFRACTORY SUPPORT, SAID SUPPORT BEING A SOLID UNITARY BODY HAVING A PLURALITY OF UNOBSTRUCTED OPENINGS THERETHROUGH, AND CALCINING THE THUS-COATED SUPPORT TO PROVIDE THE SUPPORT WITH A FILM OF CATALYTICLLY ACTIVE REFRACTORY METAL OXIDE CONTAINING CATALYTICALY EFFECTIVE AMOUNTS OF A PLATINUM GROUP METAL.
Claim 2
Dependent Claim
101 words
A PROCESS FOR PREPARING A CTALYST WHICH COMPRISES FORMING AN AQUEOUS DISPERSION OF CALCINED CATALYTICALLY ACTIVE REFRACTORY METAL OXIDE AND A PLATINUM GROUP METAL COMPOUND, SAID REFRACTORY METAL OXIDE HAVING BEEN COMBINED AS AN AQUEOUS DISPERSION WITH A WATER-SOLUBLE PLATINUM GROUP METAL COMPOUND, APPLYING SAID FORMED DISPERSION TO THE EXTERNAL SURFACES OF A CHEMICALLY INERT SUBSTANTIALLY CATALYTICALLY INACTIVE REFRACTORY SUPPORT, SAID SUPPORT BEING A SOLID UNITARY BODY HAVING A PLURALITY OF UNOBSTRUCTED OPENINGS THERETHROUGH, AND CALCINING THE THUS-COATED SUPPORT TO PROVIDE THE SUPPORT WITH A FILM OF CATALYTICLLY ACTIVE REFRACTORY METAL OXIDE CONTAINING CATALYTICALY EFFECTIVE AMOUNTS OF A PLATINUM GROUP METAL.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |