Expired Canadian patentCanada
Processing textile strands
CA 2247283 C · Owner: American & Efird Llc · Inventors: Greenberg, N. Geoffrey
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 novel method is disclosed for processing textile strands wherein high temperature heat treatment eliminates variances in hot air shrinkage caused by the manufacturing processes used to make the strands.
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
- Filed March 17, 1997 and granted September 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 17, 1997
GrantedSeptember 2, 2003
Term endedMarch 17, 2017
Patent numberCA 2247283 C
Classification (IPC)D02J13/00 +2 more
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.