Dyestuff solutions
CA 1111606 A · Owner: Bayer Aktiengesellschaft · Inventors: Groll, Manfred; Muller, Friedhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dyestuff solutions of, in which CuPc denotes copper phthalocyanine, m denotes a number from 1.8 to 2.5 and M? denotes a mixture of A? and an amine of the formula in which, n represents a number 0.8 to 1.5 A? represents an alkali metal ion or NH4 ion R1 and R2 represents hydrogen, C1-C4-alkyl or (CH2-CH2-O)p-H and, R3 represents -(CH2-CH2-O)p-H wherein, p donates an integer from 1 to 6 are suitable for dyeing paper in turquoise-colored 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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.