Biologically compatible collagenous reaction product and articles useful as medical implants produced therefrom
CA 2035986 C · Owner: Darby & Darby P.C. · Inventors: Kelman, Charles D.; Devore, Dale P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a biologically compatible collagenous reaction product comprising ethylenically unsaturated monomerically substituted collagen the monomeric, substituents being essentially free of nitrogen e.g. methy-, acrylate, styrene, polyvinyl ethylene. The collagenous, reaction product can be polymerized e.g. by exposure to UV, irradiation, chemical agents or atmospheric oxygen and molded, to form useful medical implant articles. Methods of preparation are also provided.
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 February 8, 1991 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2013.
- 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.