Carbohydrateacryl- and methacrylcopolymers and their manufacture
CA 2028094 C · Owner: Norberg, Thomas · Inventors: Norberg, Thomas; Kallin, Elisabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A copolymer of an N-acylated glycosylamine and an amide having the general formula:, (see formula I) wherein R2 is a reducing sugar residue; R3 is H or CH3;, x is an integer from 0 to about 20; and m is such that the molecular weight of the copolymer is from about b kDa to about 2000 kDa;, an N-acryloyl- or methacryloyl-glycosylamine having the formula:, (see formula II), wherein R2 is a reducing sugar residue; and R3 is H or CH3; and, processes for its preparation.
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 16, 1990 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2012.
- 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.