Colour system and use as pigments
CA 2186964 C · Owner: Tourangeau, Paulette · Inventors: Tourangeau, Paulette
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a system of natural colours made up of several thousand coloured powders of mineral origin and materials in or on which pigments have been applied and ultimately subjected to one or several heat treatments and/or irradiation treatments and whose colours cover the full spectrum of visible colour and offer a huge variety of hues tints and highlights from white to black and including all the colours of the rainbow. The powders in this system are obtained by mechanical chemical, thermal and/or physical processes and are used alone or in combination. They are usable specifically for colouring materials more specifically those intended to be used in the fields of …
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 October 1, 1996 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2018.
- 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.