Expired Canadian patentCanada
Collagen-polymer conjugates
CA 2003538 C · Owner: Rhee, Woonza · Inventors: Bentz, Hanne; Fries, Louis; Delustro, Frank
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Collagen, particularly atelopeptide collagen exhibits improved, handling characteristics when chemically conjugated and/or crosslinked with a synthetic hydrophilic polymer.
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 November 21, 1989 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 21, 1989
GrantedFebruary 6, 2001
Term endedNovember 21, 2009
Patent numberCA 2003538 C
Classification (IPC)C07K17/08 +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.