Process for the manufacture of phthalocyanine azo dyestuffs
CA 1098516 A · Owner: Cassella Aktiengesellschaft · Inventors: Springer, Hartmut; Muller, Rolf; Ribka, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fiber reactive phthalocyanine azo dyes having at least one group of the formula, wherein ar denotes a divalent aromatic or araliphatic radical, R3 and R4 denote hydrogen or optionally substituted alkyl radicals, A = the group -NH- -CO-NH-, -S02-NH- or -S02-, B = the radical of an optionally substituted, mononuclear or dinuclear, aromatic hydrocarbon X = the vinyl group, the .beta.-hydroxyethyl group or an ethyl group which is substituted in the .beta.-position by a group which can be split off by means of alkalis n = 0 or 1, and p = 0.1 or 2 are prepared by diazotizing phthalocyanine amines having at least one group of the formula S02-? -ar-NH2, wherein the amino group is linked to an …
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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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.