Expired Canadian patentCanada
Biomedical polyurethane, its preparation and use
CA 2334110 C · Owner: Polyganics B.V. · Inventors: De Groot, Jacqueline Hermina; Spaans, Coenraad Jan; Pennings, Albert Johan
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 invention is directed to a novel biomedical polyurethane based on diisocyanate linked polyester polymer and diol components said diol component , having a uniform block-length.
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 June 4, 1999 and granted September 20, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 4, 1999
GrantedSeptember 20, 2011
Term endedJune 4, 2019
Patent numberCA 2334110 C
Classification (IPC)C08G18/42 +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.