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Expired Canadian patentCanada

Systems and methods for providing information concerning chromophores in physiological media

CA 2852980 C · Owner: Vioptix, Inc. · Inventors: Hu, Guobao; Li, Feng; Zhou, Shuoming

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Abstract From the Canadian patent

The present invention generally relates to systems and methods for providing information , about chromophores in physiological media. More particularly the invention , relates to , non-invasive systems and methods for determining absolute values of oxygenated and/or , deoxygenated hemoglobins and their ratios in a physiological medium. The system generally , includes a portable probe having a source module (122) for irradiating into the medium , electromagnetic radiation a detector module (124) detecting radiation from a target area in , the medium, and a processing module (140) determining the absolute values of the , chromophore concentrations and the ratios thereof based on input …

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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 August 3, 2001 and granted November 7, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 3, 2001
GrantedNovember 7, 2017
Term endedAugust 3, 2021
Patent numberCA 2852980 C
Classification (IPC)G01N21/25 +2 more

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2002200420062008201020122014201620182020Application filedAug 3, 2001Patent grantedNov 7, 2017Term endedAug 3, 2021

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