Composite compositions of co-structured or co-adsorbed organic or mineral pigments or fillers and their uses
CA 2324939 C · Owner: Omya Development Ag · Inventors: Buri, Matthias; Gane, Patrick A. C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns composite compositions of co-structured or co-adsorbed fillers containing at least two different types of mineral or organic fillers or pigments and their use in papermaking for the mass or the coating or any other surface treatment for paper wood, metal, plastic or cement and in the fields of aqueous or non-aqueous paints and plastics. The invention also concerns coating slips filler composition for non-coated mass and base paper sheets for coating containing them.
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 April 6, 1999 and granted November 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2021.
- 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.