Modified stannic oxide-zirconium oxide composite sol and process for preparing the same
CA 2099906 C · Owner: Matsukura, Tetsunori · Inventors: Suzuki, Keitaro; Matsukura, Tetsunori; Watanabe, Yoshitane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stable sol which comprises colloidal particles of modified stannic oxide-zirconium oxide composite having a particle size of from 4.5 to 60 nm, said colloidal particles consisting essentially of, as nuclei colloidal, particles of stannic oxide-zirconium oxide composite having a particle size of from 4 to 50 nm and having a structure in which colloidal particles of stannic oxide and colloidal particles of zirconium oxide are bonded to each other in a ratio, by weight of these oxides of from, 0.02 to 1.0 as ZrO2/SnO2, and as a coating on the, surface of the nuclei colloidal particles of tungstic, oxide-stannic oxide composite having a particles size of from 2 to 7 nm and a WO3/SnO2 weight …
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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 6, 1993 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2015.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.