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Expired Canadian patentCanada

Rf pick-up coil circuit for a wide tuning range nuclear magnetic resonance probe

CA 1067578 A · Owner: Varian Associates · Inventors: Hlavka, Lloyd F.

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Abstract From the Canadian patent

Application for Patent, of, LLOYD F. HLAVKA for, RF PICK-UP COIL CIRCUIT FOR A WIDE TUNING RANGE NUCLEAR MAGNETIC RESONANCE PROBE, ABSTRACT OF THE DISCLOSURE In a wide tuning range nuclear magnetic resonance spectrometer, the probe structure includes a series resonant pick-up coil circuit disposed in RF magnetic field exchanging relation with the sample under analysis for detecting nuclear magnetic resonance of the sample. A variable capacitor is series resonated with the inductance of the pick-up coil and the capacitor is arranged for tuning the series resonance of the pick-up coil over a wide tuning range, for example from 6 to, 32 megahertz. The low series resonant impedance of the …

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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 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 4, 1979
Term endedDecember 4, 1996
Patent numberCA 1067578 A
Classification (IPC)G01R33/36

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 4, 1979Term endedDec 4, 1996

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