Particulate material comprised of particles coated with baron nitride used in cosmetic compounds and preparation process thereof
CA 2095028 C · Owner: Burdzy, Elisa L. · Inventors: Burdzy, Elisa L.; Penicnak, A. John; Hanna, Fifi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coated particules for use in cosmetic preparations comprising substrate particules a coupling agent and an outer boron nitride coating. A preferred embodiment consists of spherical hollow substrate particules of a polyvinylidene copolymer with isopropyl triisostearoyltitanate as coupling agent.
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 August 28, 1992 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2014.
- 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.