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Expired Canadian patentCanada

Hyperthermia applicator

CA 1314456 C · Owner: Zhong, Qiang-Rong · Inventors: Zhong, Qiang-Rong; Chou, Chung-Kwang

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

An intracavitary hyperthermic applicator comprising outer and inner coaxial conductors, insulating means between the conductors, The outer conductor terminating in a distal end spaced proximally from the distal ends of the inner conductor a junction defined by slot spaced from the distal end of the outer conductor, outer and inner tubular sleeves of conductive material disposed coaxially over a length of the outer conductor insulation means between the sleeves and between the inner sleeve and the outer conductor, conductive attachment means securing the proximal ends of the sleeves to the outer conductor, the outer sleeve terminating in a distal end spaced proximally from the distal end 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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1989
GrantedMarch 16, 1993
Term endedMarch 16, 2010
Patent numberCA 1314456 C
Classification (IPC)A61N5/04 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 29, 1989Patent grantedMarch 16, 1993Term endedMarch 16, 2010

Sources & verification

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