Polymer based pharmaceutical compositions for targeted delivery of biologically active agents
CA 2297025 A1 · Owner: Lau, John R. · Inventors: Geho, W. Blair; Lau, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a polymeric construct for delivering a biologically active agent to a mammal comprising a first polymeric matrix a biologically , active agent contained within the polymeric matrix and a second polymer , chemically bound to the biologically active agent said second polymer , comprising an amino acid copolymer said second polymer present in an amount effective to reduce leakage of the active agent from the polymeric construct prior to delivery to the desired situs.
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 July 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2020.
- 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.