Oxide-based hard particles coated with ceramic pigments, method for producing same and use thereof
CA 2089323 A1 · Owner: Lonza Ltd. · Inventors: Kunz, Reiner; Kerber, Albert; Strittmatter, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oxide-based hard particles are disclosed in, particular of corundum, which are coated with a ceramic pigment. A method for producing the coated particles is also disclosed. The coated hard particles of the invention are suitable, in particular, as colouring wear-reducing, and/or slip-retarding additives for ceramic glazes for, example, for ceramic floor tiles.
Read the whole patent
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 February 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2015.
- 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.