Azo pigments
CA 1060000 A · Owner: Bayer Aktiengesellschaft · Inventors: Schundehutte, Karl H.; Stephan, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Azo pigments which are free from groups which confer solubility in water and correspond to the formula, wherein A represents the radical of a diazo component X represents a cyan-, amino, ureido, acylamino or guauidino group and Y and Z independently of one another denote a hydroxyl group or an optionally substituted amino group are, suitable for pigmenting lacquers, for the preparation of printing inks dis-, tempers or paints containing binders and for the bulk dyeing of synthetic semi-synthetic or natural macro-molecular substances.
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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
- 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.