Expired Canadian patentCanada
Pre-treating textiles with dispersions of graft copolymers based on polyesters to impart soil release properties thereto
CA 2079368 C · Owner: Holland, Richard J. · Inventors: Holland, Richard J.
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 method of pretreating fabrics and textiles to impart soil release properties involves contacting the fabrics with a graft copolymer of polyoxyethylene terephthalate / polyethylene terephthalate with vinyl acetate or vinyl propionate.
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 September 29, 1992 and granted April 15, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 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.
FiledSeptember 29, 1992
GrantedApril 15, 1997
Term endedSeptember 29, 2012
Patent numberCA 2079368 C
Classification (IPC)D06M15/50 +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.