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Expired Canadian patentCanada

Magnetic resonance imaging

CA 2077760 C · Owner: Rocklage, Scott M. · Inventors: Kucharczyk, John; Rocklage, Scott M.; Moseley, Michael E.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention provides a method of detecting blood flow abnormality or variation in a human or non-human body said, method comprising administering into the systemic vasculature of a said body a contrast enhancing amount of an intravascular paramagnetic metal containing magnetic resonance imaging contrast agent subjecting said body to a magnetic resonance imaging procedure capable of generating from magnetic resonance signals from said body a series of temporally spaced images of at least a part of said body into which said agent passes and detecting temporal variations in said signals or images whereby to identify regions of abnormal or modified blood flow in said body and to indicate …

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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

  • Filed March 6, 1991 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 6, 1991
GrantedJanuary 23, 2001
Term endedMarch 6, 2011
Patent numberCA 2077760 C
Classification (IPC)G01R33/48 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedMarch 6, 1991Patent grantedJan 23, 2001Term endedMarch 6, 2011

Sources & verification

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