Expired Canadian patentCanada
Low-tension quenching of ply twist/heatset yarn
CA 1306151 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Nelson, Thomas Larson
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ply-twisted crimped continuous filament yarn having at least 40 twist reversals per meter and particularly suited for freize style carpets and the process for making the yarn is disclosed.
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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 2, 1988
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306151 C
Classification (IPC)D02G1/02 +2 more
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.