Polymer conjugates with decreased antigenicity, methods of preparation and uses thereof
CA 2500389 C · Owner: Sherman, Merry R. · Inventors: Sherman, Merry R.; Martinez, Alexa L.; Saifer, Mark G. P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods are provided for the preparation of conjugates of a variety of bioactive components, especially proteins with water-soluble polymers (e.g. poly(ethylene glycol) and derivatives thereof) which conjugates have reduced , antigenicity and immunogenicity compared to similar conjugates prepared using poly(ethylene glycol) containing a methoxyl or another alkoxyl group. The invention also provides conjugates prepared by such methods compositions , comprising such conjugates kits containing such conjugates or compositions and methods of use of the conjugates and compositions in diagnostic and therapeutic protocols.
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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 September 25, 2003 and granted March 10, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2025.
- 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
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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.