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Expired Canadian patentCanada

Intravascular blood parameter measurement system

CA 1338176 C · Owner: Maxwell, Thomas P. · Inventors: Maxwell, Thomas P.

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 parameter of blood is sensed in vivo with a system which includes a catheter and a probe. The catheter has a lumen extending therethrough, a proximal end a distal, end and a distal opening at the distal end. The probe includes one or more sensors at its distal end. A saline solution is introduced into the lumen so that there is an interface adjacent the distal opening of the catheter between the blood and saline solution. The probe is received within the catheter and affixed thereto. The interface is moved back and forth in the lumen to expose the sensors to blood so that they can sense the blood parameters of interest.

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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 26, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 26, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 29, 1988
GrantedMarch 26, 1996
Term endedMarch 26, 2013
Patent numberCA 1338176 C
Classification (IPC)A61B5/00

Timeline

Timeline From CIPO dates

198919921995199820012004200720102013Application filedJan 29, 1988Patent grantedMarch 26, 1996Term endedMarch 26, 2013

Sources & verification

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