Novel polymer compounds
CA 2425212 A1 · Owner: Van De Wetering, Petra · Inventors: Franklin, Richard; Van De Wetering, Petra; Hubbell, Jeffrey A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a composition comprising a pre-formed hydrolytically susceptible , non-addition polyanionic polymer comprising polymer strands formed from at least one ethylenically unsaturated monomer and linking the polymer strands by at least one linking moiety comprising a hydrolytically susceptible bond wherein at least one of which monomers has: i) one or more functional groups that can be titrated with base to form negatively charged functional groups: or ii) one or more precursor groups that are precursors of the functional groups that can be titrated with base; which precursor groups are converted to the functional groups.
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 August 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2022.
- 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.