A catalyst for the oxidation of sulfur dioxide
CA 2044067 C · Owner: Blumrich, Stephan · Inventors: Engler, Bernd; Blumrich, Stephan; Honnen, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solid catalyst for the oxidation of sulfur dioxide in gas currents containing oxygen, which catalyst includes vanadium oxide and alkali metal oxides alkali metal, sulfates or mixtures thereof as an active substance, silicon, aluminum or mixtures thereof, in oxide form, for surface area enlargement, and titanium dioxide in anatase form, rutile form, or mixtures thereof as a carrier, material and a ceramic binder. The metals in these finely sintered components which impart discrete functions are present in certain atomic ratios. The fine sintering takes place according to a production method especially by means of differentiated conditions of drying calcining and, sintering. One use for the …
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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 June 7, 1991 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2013.
- 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.