Azo pigments and processes for producing them
CA 1087173 A · Owner: Ciba-Geigy Ag · Inventors: Muller, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Azopigments of the formula wherein X and Y are each hydrogen, halogen alkyl or alkoxy, having 1-4 C atoms, Q is a group of the formula -CONH- or -NHCO-, and Z is an O atom or is a group of the formula -NR-, -NHCO-, -CONH-, -CH=N- or , in which R is hydrogen. alkyl having 1-4 C atoms or phenyl unsub-, stituted or substituted by halogen alkyl or alkoxy having, 1-4 C atoms, and V is hydrogen halogen, alkyl or alkoxy, having 1-4 C atoms and the azo group can be bound to the, phenyl group A or B are useful for coloring plastics in fast yellow shades.
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 October 7, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 1997.
- 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.