Polymer additives with improved permanence and surface affinity
CA 2444905 C · Owner: Dong, Ying · Inventors: Mcnamara, John James; Wood, Mervin Gale; Dong, Ying
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel stabilizers that are comprised of known polymer additive moieties chemically bound to hyperbranched and /or dendritic polymers or copolymers and novel stabilizers comprised of known polymer additive moieties chemically bound to amphiphilic copolymers exhibit superior permanence in an organic substrate as well as high surface affinity.
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 May 10, 2002 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.