Process for the production of continuously dyed, high-shrinkage filaments and fibres
CA 1068462 A · Owner: Bayer Aktiengesellschaft · Inventors: Nogaj, Alfred; Reinehr, Ulrich; Lenz, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the continuous production of filaments of high-shrinking dyed acrylonitrile copolymer which contains at least 150 milliequivalents of acid groups per kg of polymer where-, in the dry-spun and unstretched filaments are exposed to a special washingsqueezing- and drying procedure prior to the dyeing and stretching.
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 December 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 1996.
- 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.