Polyester yarns dyed according to the space dyeing method
CA 1258958 A · Owner: Akzo N.V. · Inventors: Ulbrich, Karl-Heinz; Erbacher, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyester yarns are dyed according to the spacedyeing process by using yarns in the printing process which, consist of polyethylene terephthalate fibers spun at velocities of at least 4,000 m/min. and steam-set at temperatures of up to 102°C. The fibers may be continuous filament fibers or staple fibers; preferably, yarns are used which have been spun at a speed of at least 4,500 m/min. in particular at least at 5,000 m/min. The devices used for space-dyeing may be those customarily used for the space-dyeing of polyamide yarns.
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 September 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 5, 2006.
- 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.