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Expired Canadian patentCanada

Process for differentiating the origin of particles in urine

CA 1235656 A · Owner: International Remote Imaging Systems, Inc. · Inventors: Laird, Cleve W.

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Abstract From the Canadian patent

A Process For Differentiating The Origin Of Particles In Urine, Urinary particulates in a human subject which have been coated with THP is determined to be from the region of the nephron which is above the Henle loop in the nephron where THP is produced. The identification of those particles in the urine sample which had been coated with THP is performed by subjecting the sample to THP antibodies to form THP antibody-antigen complexes. These complexes can be identified by a number of ways, such as visual, fluorescent, etc. By determining the percentage of the total particulates which have the coating of THP, a diagnostic tool for determining renal disorders is disclosed.

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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 April 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 25, 1984
GrantedApril 26, 1988
Term endedApril 26, 2005
Patent numberCA 1235656 A
Classification (IPC)G01N33/53 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedOct 25, 1984Patent grantedApril 26, 1988Term endedApril 26, 2005

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