Chrome pigments
CA 1096107 A · Owner: Imperial Chemical Industries Limited · Inventors: Dobson, Derrick C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ds.28997, ABSTRACT OF THE DISCLOSURE, This invention relates to a process for the manufacture of an improved chrome yellow pigment which comprises the simultaneous treatment of an aqueous suspension of a chrome yellow pigment with two treating agents which are (i) metaphosphoric acid or a water-soluble salt thereof and (ii) a water-soluble cerous salt. The treated pigment has improved resistance to sulphur dioxide and is particularly useful in the manufacture of industrial paints.
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
- Granted February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 1998.
- 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.