Hydrolysis resistant polyesters and articles made therefrom
CA 2449265 A1 · Owner: E.I. Du Pont De Nemours And Company · Inventors: Garrison, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyester composition comprising at least one polyester; and an epoxy system comprising diphenolic epoxy condensation polymer and at least one epoxy , compound comprising at least two epoxy groups per molecule of the epoxy compound(s). Articles made from these compositions particularly articles , requiring excellent hydrolysis resistance properties.
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 July 1, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 1, 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.