Expired Canadian patentCanada
Superior stain resistant compositions
CA 2099377 C · Owner: Williams, Michael S. · Inventors: Williams, Michael S.; Moss, Thomas H. Iii
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymeric compositions are provided for polyamide fibers or fibers having terminal amino groups that impart stain resistance and are resistant to discoloration.
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 October 7, 1992 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 7, 1992
GrantedMarch 30, 1999
Term endedOctober 7, 2012
Patent numberCA 2099377 C
Classification (IPC)D06M15/41 +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.