High strength fe-cr brown with excellent weathering
CA 2453800 C · Owner: Richardson, John Gilbert · Inventors: Gall, Mark Edward; Richardson, John Gilbert; Loucka, William Gerald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One aspect of the invention relates to a brown pigment composition with excellent weathering resistance containing iron oxide chromium oxide, and one , or more alumina and/or silica components. Another aspect of the invention relates to a method of making a brown pigment particles. Yet another aspect of the invention relates to a plastic composition containing a major amount of a plastic material and a minor amount of a brown pigment composition containing iron oxide, chromium oxide, and one or more alumina and/or silica components.
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 July 11, 2002 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2024.
- 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.