Expired Canadian patentCanada
Wettable hydrogels comprising acyclic polyamides
CA 2557340 C · Owner: Turner, David · Inventors: Molock, Frank F.; Vanderlaan, Douglas G.; Mahadevan, Shivkumar
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to biomedical devices and particularly contact , lenses comprising a polymer having entangled therein at least one acyclic polyamide.
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 February 25, 2005 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 25, 2005
GrantedJanuary 8, 2013
Term endedFebruary 25, 2025
Patent numberCA 2557340 C
Classification (IPC)C08L101/14 +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.