Anthraquinone dyestuffs
CA 1060009 A · Owner: Ciba-Geigy Ag · Inventors: Jost, Max
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New anthraquinone dyestuffs, Abstract of the Disclosure Anthraquinone dyestuffs of the formula wherein A1, A2 and A3 denote identical or different anthraquinonoid radicals, Q, X, Y and Z denote hydrogen atoms or alkyl groups with 1 to 4 carbon atoms and Z further denotes the radical A1NH-,and the radicals A1NH- and A2NH- as well as A3NH- and Z, if Z denotes the radical A1NH-, are in the m- or p-position relative to one another which are useful for pigmenting thermoplastic polymers in the mass.
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.