Photocatalyst compound and process for production thereof
CA 2222499 C · Owner: Persaud, Lalchan · Inventors: Lepore, Giuseppe P.; Persaud, Lalchan; Langford, Cooper H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photocatalyst compound comprising a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO2, WO3 and mixtures thereof the photocatalyst compound , having been derivatized by reaction with an alcohol compound. The process for producing the photocatalyst compound comprises the steps of: (i) contacting a silica-based support material having bound thereto a photocatalyst selected from the group consisting of TiO2 WO3 and , mixtures thereof with an alcohol compound to form a slurry; (ii) maintaining the temperature of the slurry above the boiling point of the slurry to produce a substance having a modified surface consisting essentially …
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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 May 24, 1996 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2018.
- 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
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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.