Reactive dyes, their preparation and the use thereof
CA 1312857 C · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Begrich, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-16945/-, Reactive dyes, their preparation and the use thereof Abstract of the Disclosure, Reactive dyes of formula (1), wherein Y is a radical of formula (2), or -CO-A-SO2-X (3), Z is -NH2, an unsubstituted or a substituted aliphatic or aromatic amino group; A is an unsubstituted or a substituted aliphatic or aromatic bridging group, and X is .beta.-sulfatoethyl .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-acyloxyethyl, .beta.-haloethyl or vinyl; the benzene rings I II and, III may contain further substituents in addition to 2 to 4 sulfo groups and, in the benzene ring II, to the radical -NH-Y; and the reactive dyes of formula (1) contain only a single fibre-reactive radical …
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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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.