Non cross-linked block polyetherester, preparation and uses
CA 2330498 A1 · Owner: Orsolini, Piero · Inventors: Orsolini, Piero; Ferruti, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a non cross-linked block polymer. It also concerns a method for preparing it and its use particularly in pharmaceutical compositions. Said block polymer is characterised in that it contains polyethylene glycol sequences bound with polyester and/or polycarbonate sequences. The polyester sequences are selected among polyfumarate polymaleate and polysuccinate sequences.
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 April 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2021.
- 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.