US2934504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activation of clay
Assignee: Houdry Process Corp
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Filing: 1957-04-17
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Granted: 1960-04-26
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Talvenheimo Gerhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN THE PREPARATION OF ACTIVE CATALYSTS FROM CLAY BY METHOD INVOLVING SULFATION OF SUCH CLAY TO INCORPORATE SULFATE THEREIN BY REACTION WITH COMPONENTS OF SAID CLAY AND FOLLOWED BY DECOMPOSITION OF THE THUS COMBINED SULFATE AT ELEVATED TEMPERATURE WITH EVOLUTION OF SULFUROXIDE GAS, THE IMPROVEMENT WITH COMPRISES EFFECTING SUCH SULFATION BY TREATMENT OF THE CLAY WITH A COMPOSITION COMPRISING CONCENTRATED SULFURIC ACID AND A SATURATED ORGANIC HYDROXY COMPOUND MISCIBLE WITH SAID ACID AND PRESENT IN AN AMOUNT OF AT LEAST 2% BY WEIGHT OF ACID, SAID COMPOUND CONTAINING AN ALCOHOLIC HYDROXY GROUP AND BEING FREE OF NON-OXO CARBONYLIC GROUPS.
Claim 2
Dependent Claim
99 words
IN THE PREPARATION OF ACTIVE CATALYSTS FROM CLAY BY METHOD INVOLVING SULFATION OF SUCH CLAY TO INCORPORATE SULFATE THEREIN BY REACTION WITH COMPONENTS OF SAID CLAY AND FOLLOWED BY DECOMPOSITION OF THE THUS COMBINED SULFATE AT ELEVATED TEMPERATURE WITH EVOLUTION OF SULFUROXIDE GAS, THE IMPROVEMENT WITH COMPRISES EFFECTING SUCH SULFATION BY TREATMENT OF THE CLAY WITH A COMPOSITION COMPRISING CONCENTRATED SULFURIC ACID AND A SATURATED ORGANIC HYDROXY COMPOUND MISCIBLE WITH SAID ACID AND PRESENT IN AN AMOUNT OF AT LEAST 2% BY WEIGHT OF ACID, SAID COMPOUND CONTAINING AN ALCOHOLIC HYDROXY GROUP AND BEING FREE OF NON-OXO CARBONYLIC GROUPS.
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |