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Expired Canadian patentCanada

Nmr imaging apparatus

CA 1198162 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Hay, Robert D.; Lee, Denny L.Y.

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Abstract From the Canadian patent

An NMR imaging apparatus is described having a desired imaging volume for imaging of biological tissue said apparatus, comprising bias means for generating a bias field components for, generating gradient fields and radio frequency means for applying a pulse of electromagnetic radiation to the biological tissue and for detecting the resultant signals emitted from said tissue; wherein said bias means comprises a plurality of dipole ring magnets, each dipole ring magnet comprising a plurality of segments, each segment comprising an oriented anisotropic permanent, magnet material arranged in a ring so that there is a substantially continuous ring of permanent magnet material; wherein the inner …

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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 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2002.
  • 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, 1983
GrantedDecember 17, 1985
Term endedDecember 17, 2002
Patent numberCA 1198162 A
Classification (IPC)G01R33/24 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJuly 13, 1983Patent grantedDec 17, 1985Term endedDec 17, 2002

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