Silver-deposited catalyst for production of ethylene oxide
CA 1329191 C · Owner: Saotome, Yoshiaki · Inventors: Saotome, Yoshiaki; Nojiri, Naohiro; Iwakura, Tomoatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silver-deposited catalyst for the production of ethylene oxide by the oxidation of ethylene said, catalyst comprising, (1) a carrier composed mainly of alpha-alumina which carrier does not show acidity in a visual color change method in a toluene solvent using a dimethyl yellow indicator having a pKa of +3.3, and does not show basicity in a color reaction in a toluene solvent using a bromothymol blue having a pKa of +7.1, and (2) as catalyst components, silver and at least one cationic component selected from sodium potassium, rubidium and cesium.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.