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US2921035A
Expired / Lapsed
US
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Catalyst manufacture
Assignee: Oxy Catalyst Inc
•
Filing: 1954-07-19
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Granted: 1960-01-12
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Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:41
CPC Classifications
C; C08; C08G; C08G73/00; B; B01; B01J; B01J37/00; B01J37/02; B01J37/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN THE MANAFACTURE OF CATALYSTS, A METHOD FOR DEPOSITING ON A SUBSTANTIALLY CATALYTICALLY INERT, SUBSTANTIALLY IMPERVIOUS SUPPORTING SURFACE A THIN, HARD FILM OF A CATALYTICALLY ACTIVE FORM OF AN INORGANIC OXIDE SELECTED FROM THE FROUP CONSISTING OF ALUMINA BERYLLIA, ZIRCONIA, THORIA, MAGNESIA AND SILICA, SAID METHOD COMPRISING THE STEPS OF CONTACTING THE SUPPORTING SURFACE WITH A SUSPENSION CONTAINING THE OXIDE IN AT LEAST POTENTIALLY ACTICE BUT NON-GELATINUOUS FORM AND IN SUCH DEGREE OF SUBDIVISION THAT SUBSTANTIALLY 100% BY WEIGHT THEREOF CONSISTS OF PARTICLES OF LESS THAN 40 MICRONS IN SIZE, AND THE SPECIFIC SURFACE THEREOF IS AT LEAST 60,000 CM.2/CM.3, THEREBY DEPOSITING A FILM OF SAID OXIDE THEREON, AND THEREAFTER DRYING SAID FILM.
Claim 2
Dependent Claim
113 words
IN THE MANAFACTURE OF CATALYSTS, A METHOD FOR DEPOSITING ON A SUBSTANTIALLY CATALYTICALLY INERT, SUBSTANTIALLY IMPERVIOUS SUPPORTING SURFACE A THIN, HARD FILM OF A CATALYTICALLY ACTIVE FORM OF AN INORGANIC OXIDE SELECTED FROM THE FROUP CONSISTING OF ALUMINA BERYLLIA, ZIRCONIA, THORIA, MAGNESIA AND SILICA, SAID METHOD COMPRISING THE STEPS OF CONTACTING THE SUPPORTING SURFACE WITH A SUSPENSION CONTAINING THE OXIDE IN AT LEAST POTENTIALLY ACTICE BUT NON-GELATINUOUS FORM AND IN SUCH DEGREE OF SUBDIVISION THAT SUBSTANTIALLY 100% BY WEIGHT THEREOF CONSISTS OF PARTICLES OF LESS THAN 40 MICRONS IN SIZE, AND THE SPECIFIC SURFACE THEREOF IS AT LEAST 60,000 CM.2/CM.3, THEREBY DEPOSITING A FILM OF SAID OXIDE THEREON, AND THEREAFTER DRYING SAID FILM.
References Cited (Backward Citations)
US2423686A
Cited
US2742437A
Cited
US2580806A
Cited
US2686161A
Cited
US2650202A
Cited
US2669547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |