Sugar-based polymers
CA 2088366 C · Owner: Rethwisch, David G. · Inventors: Patil, Damodar R.; Rethwisch, David G.; Dordick, Jonathan S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chemoenzymatic methods of making sugar-based polymers are disclosed as well as novel sugar-based polymers. In one embodiment, acylated sugars are copolymerized with coreactants to yield novel sugar-based polymers. In another embodiment non reducing sugars acylated with a compound having a terminal double bond are polymerized to yield novel sugar-based polymers.
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 27, 1992 and granted July 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2014.
- 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.