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Expired Canadian patentCanada

Nuclear magnetic resonance imaging system

CA 1215114 A · Owner: Henry Ford Hospital · Inventors: Ewing, James R.

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

Abstract of the Disclosure, A nuclear magnetic resonance imaging system comprising a high field solenoidal magnet providing a uniform static magnetic field surrounding a subject, an RF coil surrounding the subject, a receiver coil surrounding the subject and a, cylindrical shell of magnetic material surrounding the magnet and the RF and receiver coils. The shell is positioned such that the wall thereof lies in the area of the field of the magnet where the shell's permeability is substantially at a maximum for the imposed field such that the shell functions to substantially confine the field of the magnet to an area about the shell and the environment is not adversely affected and no …

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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 December 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 2003.
  • 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 13, 1984
GrantedDecember 9, 1986
Term endedDecember 9, 2003
Patent numberCA 1215114 A
Classification (IPC)G01N24/08 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJuly 13, 1984Patent grantedDec 9, 1986Term endedDec 9, 2003

Sources & verification

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