Contrast agent
CA 2201158 A1 · Owner: Nycomed Imaging A/S · Inventors: Jacobsen, Anne; Strande, Per; Fahlvik, Anne Kjersti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to particulate contrast agents especially contrast , agents for MR imaging having a metal oxide, preferably superparamagnetic iron oxide core provided with a low coating density of a polyelectrolyte coating agent selected from structural polysaccharides and synthetic polymers especially polyaminoacids. Unlike conventional coated particulates the new , particles have reduced or no effect on cardiovascular parameters platelet , depletion, complement activation and blood coagulation.
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 September 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2016.
- 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.