Expired Canadian patentCanada
Water-soluble polyhydroxyaminoether and process for preparing the same
CA 2533166 C · Owner: Harris, William J. · Inventors: Harris, William J.; Glass, Terry Wayne; White, Jerry E.
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 water soluble polymer comprising a copolyhydroxyaminoether having sidechains of polyalkylene oxides, an aqueous solution of said polymer and process for preparing the copolyhydroxyaminoether.
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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 July 19, 2004 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 19, 2004
GrantedSeptember 25, 2012
Term endedJuly 19, 2024
Patent numberCA 2533166 C
Classification (IPC)C08G73/02
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.