Patent US4382017A successfully refreshed from Google Patents.
US4382017A
Expired / Lapsed
US
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Means and method for providing a non-freezing catalyst solution
Assignee: Individual
•
Filing: 1980-09-02
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Granted: 1983-05-03
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Expires: 2000-09-02
Abstract
Abstract A non-freezing catalyst solution carries a platinum group metal compound admixed with an antifreeze compound which is blocked from reaction therewith by a blocking agent. The blocking agent is selected from the group consisting of hydrogen chloride and lithium chloride. All of the materials are soluble in solution at room temperature.
Inventors
- 👤 Charles A. Robinson
- 👤 Barnett J. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:24
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J27/00; B01J27/06; B01J27/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A method of preventing unwanted precipitation of a stable aqueous catalyst solution comprising an admixture of a water soluble compound of platinum and chlorine in a catalytic amount, and an antifreeze compound selected from the group consisting of alcohol and glycols and mixtures thereof, said method comprising adding a chloride selected from the group consisting of hydrochloric acid, lithium chloride, sodium chloride and mixtures thereof to said compound of platinum or to said antifreeze compound prior to admixing said antifreeze compound and said platinum compound, and following said admixing, adding water to provide approximately 50% water by volume.
Claim 2
Independent Claim
98 words
A method of preventing unwanted precipitation of a stable aqueous catalyst solution comprising an admixture of a water soluble compound of platinum and chlorine in a catalytic amount, and an antifreeze compound selected from the group consisting of alcohol and glycols and mixtures thereof, said method comprising adding a chloride selected from the group consisting of hydrochloric acid, lithium chloride, sodium chloride and mixtures thereof to said compound of platinum or to said antifreeze compound prior to admixing said antifreeze compound and said platinum compound, and following said admixing, adding water to provide approximately 50% water by volume.
Claim 3
Dependent Claim
34 words
A method according to claim 1 wherein said compound of platinum and chlorine is H 2 PtCl 6 .6H 2 O, said antifreeze compound is ethylene glycol, and wherein said chloride is lithium chloride.
References Cited (Backward Citations)
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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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |