Heat resistant yellow pigments, processes for their preparation and their use
CA 1283254 C · Owner: Burow, Wilfried · Inventors: Burow, Wilfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heat resistant yellow pigments, processes for their preparation and their use, ABSTRACT OF THE DISCLOSURE Heat resistant iron oxide yellow pigments containing aluminium compounds of the formular (A10)xPO4 (OH)X-3 where x is a value from 3 to 10 is prepared by applying the alumium compound to an iron oxide pigment and is useful as a coloring agent in lacquers and synthetic thermoplastic materials. Le A 24 175
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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
- Granted April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2008.
- 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.