Supported catalyst, process for its production, and its use in oxychlorination of ethylene
CA 2254562 A1 · Owner: Schmidhammer, Ludwig · Inventors: Haselwarter, Klaus; Frank, Albin; Muller, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A supported catalyst comprises:, (a) 0.5 - 15 wt.% of one or more Cu-II compounds the, quantitative amounts referring to the copper metal; (b) 0.1 - 8 wt.% of one or more alkali metal compounds the quantitative amounts referring to the alkali metal;, (c) 0.1 - 10 wt.% of an oxide mixture comprising (c1) 80 - 95 mole % of oxides of cerite rare earths with atomic Nos. 57 to 62, except promethium and, (c2) 5 - 20 mole % of zirconium dioxide where (c1), and (c2) together total 100 mole % and the quantitative amount of (c) refers to the oxides of the mixture; and, (d) the remainder up to 100 wt.% is .gamma.- and/or ~- aluminium oxide as support material;, wherein, (e) the support material (d) …
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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
- Filed November 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2020.
- 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.