Phosphorylated contrast agents for mri of the gi tract
CA 2133746 A1 · Owner: Imarx Pharmaceutical Corp. · Inventors: Unger, Evan C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods of providing an image of the gastrointestinal region of a patient and diagnosing the presence of any tumorous tissue in that region using contrast media comprising a combination of at least one polyphosphorylated aliphatic or polyphosphorylated cyclic compound and at least one paramagnetic ion wherein the aliphatic, and cyclic compounds comprise at least five carbon atoms is, described. Also described are diagnostic kits for gastrointestinal imaging which include the subject contrast media.
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 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 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.