Nacreous pigments
CA 1203953 A · Owner: Merck Patent Gesellschaft Mit Beschraenkter Haftung · Inventors: Esselborn, Reiner; Kieser, Manfred; Ambrosius, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
NACREOUS PIGMENTS", Abstract of the Disclosure Nacreous pigments which have improved stability to weathering and are based on mica flakes coated with metal oxides, are provided with a stabilizing chromium-, containing second coating which comprises a combination of metal salts. To form the second layer iron and/or, manganese are deposited on the starting pigments in the form of the hydroxide, carbonate or phosphate and chromium is deposited on the starting pigments in the form of the hydroxide, carbonate or phosphate or as methacrylate-chromium chloride. These are prepared by adding iron and/or manganese and chromium in the, form of salt solutions and at a pH of 2 to 8 to an, aqueous …
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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 May 6, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 2003.
- 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.