Liquid reactive dyestuff preparations and their use
CA 1191656 A · Owner: Hoechst Aktiengesellschaft · Inventors: Opitz, Konrad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Abstract of the disclosure:, The invention relates to liquid reactive dyestuff preparations containing one or several dyestuffs the chromo-, phore of which has of from 1 to 8 SO3H groups and of from 1 to 3 fiber-reactive groups, a dissolving mediator an, anionic dispersing agent and buffer substances and having a pH of from 3 to 7. These preparations are particularly stable to storage and are suitable for dyeing and printing natural and synthetic fiber material.
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 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- 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.