Non-settling, universal machine dispensable pearlescent pigment dispersions
CA 2290401 C · Owner: Huls America Inc. · Inventors: Bellas, Thomas M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous, non-settling, universal nacreous pigment dispersion that can be used in dispensing machines for the custom mixing of retail and trade sales of alkyd or solvent-thinned and water-based surface coatings employs a synthetic silicate, sodium lithium magnesium silicate, as the suspending agent. Also disclosed are methods for preparing the dispersion which incorporates one or more carriers humectants, surfactants and other optional conventional additives.
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 March 3, 1998 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2020.
- 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.