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Expired Canadian patentCanada

Thermoelectrically controlled heat medical catheter

CA 1306162 C · Owner: Johnson, Norman J.E. · Inventors: Anand, Raj K.; Johnson, Norman J.E.

CIPO record

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

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Abstract From the Canadian patent

A system and method are disclosed for providing precisely controlled heating (and cooling in come cases) of a small region of body tissue to effectuate the removal of tumors and deposits, such as atheromatous plaque, without causing damage to healthy surrounding tissue, e.g. arterial walls. Such precisely controlled heating is produced through thermoelectric and resistive heating, and thermoelectric control of a heated probe tip. The system includes a probe tip with N-doped and P-doped legs of semiconductor material a catheter to which the, probe tip is attached for insertion into a patient's body and, a system control mechanism. The probe may be used for reduction and/or removal of …

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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 1, 1988
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306162 C
Classification (IPC)A61B17/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 1, 1988Patent grantedAug 11, 1992Term endedAug 11, 2009

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