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Expired Canadian patentCanada

System for quantifying blood flow in tissue with periodic updating of tissue baseline conditions

CA 2523385 C · Owner: Bowman, H. Frederick · Inventors: Martin, Gregory T.; Bowman, H. Frederick

CIPO record

Overview

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

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Abstract From the Canadian patent

Disclosed are methods and apparatus for determining blood flow in tissue. Particularly methods and apparatus are disclosed for establishing baseline thermal properties for the tissue and providing one or more steps for periodically determining changes in the tissue thermal properties that correspond to a need for a new baseline and establishing the new baseline.

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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

  • Filed April 4, 2003 and granted April 1, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2025.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 4, 2003
GrantedApril 1, 2014
Term endedApril 4, 2023
Patent numberCA 2523385 C
Classification (IPC)A61B5/00

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedApril 4, 2003Patent grantedApril 1, 2014Term endedApril 4, 2023

Sources & verification

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