US2595056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a silica-metal oxide gel catalyst
Assignee: Standard Oil Development Co
•
Filing: 1949-01-27
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Granted: 1952-04-29
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Gerald C Connolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PREPARING A SYNTHETIC GEL COMPRISING SILICA AND A METAL OXIDE WHICH COMPRISES FORMING A SUBSTANTIALLY PURE SILICA HYDROGEL, SOAKING SAID HYDROGEN IN A METALLIC SALT SOLUTION UNTIL THE HYDROGEL IS THOROUGHLY IMPREGNATED WITH METALLIC SALT SOLUTION, THEREAFTER DRAINING EXCESS SALT SOLUTION FROM THE HYDROGEN, TREATING THE IMPREGNATED HYDROGEL WITH A VOLATILE BASE IN AN AMOUNT INSUFFICIENT TO REACT COMPLETELY WITH ALL OF SAID SALT BUT SUFFICIENT TO REACT WITH A MAJOR PORTION OF SAID SALT WHEREBY SAID GEL REMAINS
Claim 2
Dependent Claim
82 words
A PROCESS FOR PREPARING A SYNTHETIC GEL COMPRISING SILICA AND A METAL OXIDE WHICH COMPRISES FORMING A SUBSTANTIALLY PURE SILICA HYDROGEL, SOAKING SAID HYDROGEN IN A METALLIC SALT SOLUTION UNTIL THE HYDROGEL IS THOROUGHLY IMPREGNATED WITH METALLIC SALT SOLUTION, THEREAFTER DRAINING EXCESS SALT SOLUTION FROM THE HYDROGEN, TREATING THE IMPREGNATED HYDROGEL WITH A VOLATILE BASE IN AN AMOUNT INSUFFICIENT TO REACT COMPLETELY WITH ALL OF SAID SALT BUT SUFFICIENT TO REACT WITH A MAJOR PORTION OF SAID SALT WHEREBY SAID GEL REMAINS
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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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |