Process for dyeing cellulose fibers
CA 1071357 A · Owner: Basf Aktiengesellschaft · Inventors: Wilhelm, Ernst; Wolf, Hans; Gerendas, Jozsef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the dyeing of cellulose fibers or mixtures of cellulose fibers with synthetic fibers which comprises dyeing a textile material made of said cellulose fibers or said mixtures of fibers by the exhaustion method at ambient temperature to about 130°C in an aqueous liquor containing a dye for cellulose fibers and as dyeing assistant, from 0,05 to 2% by weight based on the material being dyed, of a water-soluble polymer selected from the group consisting of water-soluble homopolymers of acrylic acid water soluble, copolymers of acrylic acid with up to 50% by weight of methacrylic acid, methacrylamide, acrylamide acrylonitrile, methacrylonitrile, esters of acrylic acid and …
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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 February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 1997.
- 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.