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Expired Canadian patentCanada

Nmr imaging with paramagnetic polyvalent metal salts of poly-(acid-alkylene-amino)-alkanes

CA 1321346 C · Owner: Worah, Dilip · Inventors: Rocklage, Scott M.; Quay, Steven C.; Worah, Dilip

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Abstract From the Canadian patent

In a method of imaging body tissue in a patient comprising administering to the patient an effective amount of a pharmaceutical agent for affecting the relaxation times of atoms in body tissues undergoing NMR diagnosis whereby, image contrast is enhanced, said agent comprising an amount effective to affect such relaxation times of a paramagnetic, physiologically compatible salt of a physiologically compatible chelate complex of an ion of a lanthanide element of atomic numbers 57-70, or of a transition metal of atomic numbers 21-29, 42, or 44; and a pharmaceutically acceptable carrier, and subjecting the patient to NMR tomography the, improvement wherein said salt of said chelate complex is …

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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

  • Granted August 17, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 17, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 22, 1987
GrantedAugust 17, 1993
Term endedAugust 17, 2010
Patent numberCA 1321346 C
Classification (IPC)A61K49/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 22, 1987Patent grantedAug 17, 1993Term endedAug 17, 2010

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.