Surface-modifying copolymers having cell adhesion properties
CA 2197000 C · Owner: Riffle, Judy S. · Inventors: Riffle, Judy S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hemocompatible surface-modifying additive is provided for modifying polyurethane or polyurethane-urea substrates. The additive has a polyurethane or polyurethane urea hard block or an alternative block which is miscible with the poly(urethane) or poly(urethane-urea) base polymer a polysiloxane , hydrophobic soft block an optional hydrophilic spacer and a peptide selected from the group consisting of Arg-Gly-Asp X-Arg-Gly-Asp, Arg-Gly-Asp-X and X-, Arg-Gly-Asp-X' wherein X and X' are amino acids.
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 22, 1996 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2018.
- 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.