Catalyst for the selective oxidation of sulphur compounds to elemental sulphur, process for preparing such a catalyst and method for the selective oxidation of sulphur compounds to elemental sulphur
CA 2021527 C · Owner: Van Den Brink, Peter John · Inventors: Van Den Brink, Peter John; Geus, John Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a catalyst for the selective oxidation of sulphur-containing compounds to elemental sulphur, comprising at least one catalytically active material and optionally a carrier, the catalyst having a specific surface area of more than 20 m2/g and an average pore radius of at least 25 .ANG. while under the reaction conditions the catalyst exhibits no substantial activity towards the Claus reaction.
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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 July 19, 1990 and granted September 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2012.
- 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.