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Expired Canadian patentCanada

Lateralization spectrophotometer

CA 2103166 C · Owner: Chance, Britton · Inventors: Robertson, Claudia; Chance, Britton

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

One preferred embodiment utilizes differential measurement of radiation that migrated in two migration paths, between two source (100) detector (110) pairs placed on the brad in a manner that tech path is localized in a portion of one hemisphere. The present invention also provides in various embodiments of spectrophotometer systems for in vivo, examination of a tissue of a human by measuring changes in electromagnetic radiation scattered and absorbed in a, migration path in the tissue. Generally the spectrophotometer systems , comprise a light source for introducing the radiation into the tissue, a detector for detecting radiation that has migrated in the tissue, processing means for …

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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 May 18, 1992 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1992
GrantedOctober 28, 2003
Term endedMay 18, 2012
Patent numberCA 2103166 C
Classification (IPC)G01N21/49 +1 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedMay 18, 1992Patent grantedOct 28, 2003Term endedMay 18, 2012

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