US3849343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalyst manufacture
Assignee: Universal Oil Products Co
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Filing: 1973-02-05
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Granted: 1974-11-19
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Expires: 1993-02-05
Abstract
Abstract 1. IN THE PREPARATION OF A CATALYTIC COMPOSITE WHEREIN A POROUS REFRACTORY CARRIER MATERIAL IS IMPREGNATED WITH A SOLUTION OF A COMPOUND OF A PLATINUM GROUP METAL AND A SOLUTION OF A COMPOUND OF AN ALKALINE EARTH METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND BARIUM, THE IMPROVEMENT WHICH COMPRISES: (A) IMPREGNATING A POROUS REFRACTORY CARRIER MATERIAL WITH A SOLUTION OF A COMPOUND F AT LEAST ONE PLATINUM GROUP METAL; (B) PRIOR TO CALCINING THE IMPREGNATED CARRIER MATERIAL, FURTHER IMPREGNATING THE SAME WITH A COMPOUND OF SAID ALKALINE EARTH METAL IN SOLUTION WITH A REDUCING AGENT; AND (C) THEREAFTER DRYING AND CALCINING THE RESULTANT COMPOSITE.
Inventors
- 👤 J Hoekstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE PREPARATION OF A CATALYTIC COMPOSITE WHEREIN A POROUS REFRACTORY CARRIER MATERIAL IS IMPREGNATED WITH A SOLUTION OF A COMPOUND OF A PLATINUM GROUP METAL AND A SOLUTION OF A COMPOUND OF AN ALKALINE EARTH METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND BARIUM, THE IMPROVEMENT WHICH COMPRISES: (A) IMPREGNATING A POROUS REFRACTORY CARRIER MATERIAL WITH A SOLUTION OF A COMPOUND F AT LEAST ONE PLATINUM GROUP METAL; (B) PRIOR TO CALCINING THE IMPREGNATED CARRIER MATERIAL, FURTHER IMPREGNATING THE SAME WITH A COMPOUND OF SAID ALKALINE EARTH METAL IN SOLUTION WITH A REDUCING AGENT; AND (C) THEREAFTER DRYING AND CALCINING THE RESULTANT COMPOSITE.
Claim 2
Dependent Claim
106 words
IN THE PREPARATION OF A CATALYTIC COMPOSITE WHEREIN A POROUS REFRACTORY CARRIER MATERIAL IS IMPREGNATED WITH A SOLUTION OF A COMPOUND OF A PLATINUM GROUP METAL AND A SOLUTION OF A COMPOUND OF AN ALKALINE EARTH METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND BARIUM, THE IMPROVEMENT WHICH COMPRISES: (A) IMPREGNATING A POROUS REFRACTORY CARRIER MATERIAL WITH A SOLUTION OF A COMPOUND F AT LEAST ONE PLATINUM GROUP METAL; (B) PRIOR TO CALCINING THE IMPREGNATED CARRIER MATERIAL, FURTHER IMPREGNATING THE SAME WITH A COMPOUND OF SAID ALKALINE EARTH METAL IN SOLUTION WITH A REDUCING AGENT; AND (C) THEREAFTER DRYING AND CALCINING THE RESULTANT COMPOSITE.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |