Patent US3224892A successfully refreshed from Google Patents.
US3224892A
Expired / Lapsed
US
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High surface area aluminum silicate and method of making same
Assignee: BASF Catalysts LLC
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Filing: 1962-07-27
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Granted: 1965-12-21
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 Glen A Hemstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:35
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; A; A01; A01N; A01N25/00; A01N25/08; A61; A61K; A61K9/00; A61K9/14; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C01; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2006/00; C01P2006/12; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF INCREASING THE SURFACE AREA OF KAOLIN CLAY WHICH COMPRISES CALCINING KAOLIN CLAY FOR A TIME SUFFICIENT TO PRODUCE DEHYDRATED KAOLIN CLAY, COOLING THE DEHYDRATED KAOLIN CLAY TA A TEMPERATURE BELOW ABOUT 125*C., AND SUBJECTING SAID DEHYDRATED CLAY TO HYDROTHERMAL TREATMENT AT A PRESSURE OF AT LEAST 300 P.S.I.G. AT A TEMPERATURE AND FOR A TIME SELECTED TO PRODUCE A PARTIALLY REHNYDRATED MATERIAL CONTAINING FROM ABOUT 60% TO ABOUT 85% OF THE WATER OF HYDRATION OF THE ORIGINAL KAOLIN CLAY AND HAVING A 12.5*2O BASAL REFLECTON INTENSITY WHICH IS A SMALL FRACTION OF THAT OF KAOLIN CLAY.
Claim 2
Independent Claim
99 words
A METHOD OF INCREASING THE SURFACE AREA OF KAOLIN CLAY WHICH COMPRISES CALCINING KAOLIN CLAY FOR A TIME SUFFICIENT TO PRODUCE DEHYDRATED KAOLIN CLAY, COOLING THE DEHYDRATED KAOLIN CLAY TA A TEMPERATURE BELOW ABOUT 125*C., AND SUBJECTING SAID DEHYDRATED CLAY TO HYDROTHERMAL TREATMENT AT A PRESSURE OF AT LEAST 300 P.S.I.G. AT A TEMPERATURE AND FOR A TIME SELECTED TO PRODUCE A PARTIALLY REHNYDRATED MATERIAL CONTAINING FROM ABOUT 60% TO ABOUT 85% OF THE WATER OF HYDRATION OF THE ORIGINAL KAOLIN CLAY AND HAVING A 12.5*2O BASAL REFLECTON INTENSITY WHICH IS A SMALL FRACTION OF THAT OF KAOLIN CLAY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |