Continuous process and new interlaced polyester yarns
CA 1234663 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Palmer, Russell N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous process for preparing a package of polyester yarn having a low shrinkage by spinning hot-drawing, heat-relaxing, interlacing and winding wherein the shrinkage is reduced while minimizing reduction of tenacity by keeping the yarn hotter preferably by using heated air for interlacing.
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 April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
- 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.