Expired Canadian patentCanada
Light and moisture resistant metal oxide-coated mica pigments
CA 2036262 C · Owner: Engelhard Corporation · Inventors: Deluca, Carmine V. Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal oxide coated mica pigments are, provided with enhanced light and moisture stability by providing on the particle surfaces a coating of hydrous aluminum oxide.
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 13, 1991 and granted March 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 13, 1991
GrantedMarch 18, 1997
Term endedFebruary 13, 2011
Patent numberCA 2036262 C
Classification (IPC)C09C1/00
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.