Patent US2723243A successfully refreshed from Google Patents.
US2723243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of silica-metal oxide spheroids
Assignee: Universal Oil Products Co
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Filing: 1952-07-30
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Granted: 1955-11-08
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Expires: 1972-07-30
Abstract
No abstract record available.
Inventors
- 👤 Donald L Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:29
CPC Classifications
B; B01; B01J; B01J21/00; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A METHOD FOR THE MANUFACTURE OF A COMPOSITE OF SILICA AND AN OXIDE OF A METAL WHICH COMPRISES COMMINGLING A SILICA SOL, A GELLABLE HYDROUS OXIDE SOL OF SAID METAL AND AN ACIDIC SOLUTION OF A SALT OF SAID METAL, CONTACTING THE RESULTANT MIXTURE WITH A BASIC MEDIUM AND THEREBY FORMING A FIRM GEL, AND CALCINING SAID GEL.
Claim 2
Independent Claim
58 words
A METHOD FOR THE MANUFACTURE OF A COMPOSITE OF SILICA AND AN OXIDE OF A METAL WHICH COMPRISES COMMINGLING A SILICA SOL, A GELLABLE HYDROUS OXIDE SOL OF SAID METAL AND AN ACIDIC SOLUTION OF A SALT OF SAID METAL, CONTACTING THE RESULTANT MIXTURE WITH A BASIC MEDIUM AND THEREBY FORMING A FIRM GEL, AND CALCINING SAID GEL.
Claim 3
Dependent Claim
85 words
A COMPOSITION SUITABLE FOR THE PREPARATION OF A DRIED SILICA-ALUMINA COMPOSITE COMPRISING A SILICA SOL, AN ALUMINA SOL AND AN ACIDIC ALUMINUM SALT SOLUTION IN PROPORTIONS TO FORM A MIXTURE HAVING A SILICA CONTENT OF FROM ABOUT 4 TO ABOUT 10 WEIGHT PERCENT, AN ALUMINA SOL CONTENT OF FROM ABOUT 5 TO ABOUT 60 WEIGHT PERCENT CALCULATED AS ALUMINA, AN ALUMINUM SALT CONTENT OF FROM ABOUT 0.5 TO ABOUT 15 WEIGHT PERCENT CALCULATED AS ALUMINA, AND A PH OF FROM ABOUT 2 TO ABOUT 5.
Claim 4
Dependent Claim
85 words
A COMPOSITION SUITABLE FOR THE PREPARATION OF A DRIED SILICA-ALUMINA COMPOSITE COMPRISING A SILICA SOL, AN ALUMINA SOL AND AN ACIDIC ALUMINUM SALT SOLUTION IN PROPORTIONS TO FORM A MIXTURE HAVING A SILICA CONTENT OF FROM ABOUT 4 TO ABOUT 10 WEIGHT PERCENT, AN ALUMINA SOL CONTENT OF FROM ABOUT 5 TO ABOUT 60 WEIGHT PERCENT CALCULATED AS ALUMINA, AN ALUMINUM SALT CONTENT OF FROM ABOUT 0.5 TO ABOUT 15 WEIGHT PERCENT CALCULATED AS ALUMINA, AND A PH OF FROM ABOUT 2 TO ABOUT 5.
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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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |