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Expired Canadian patentCanada

Bioassay for chemicals which generate prooxidant states

CA 1339059 C · Owner: Blondin, George A. · Inventors: Knobeloch, Lynda M.; Harkin, John M.; Blondin, George A.

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Abstract From the Canadian patent

A bioassay making use of submitochondrial particles to test for the presence of toxic substances which induce prooxidant states in vivo. The assay uses complex I of the electron transport enzymes on the submitochondrial particles which are capable of donating electrons to the toxicant in solution. The presence of any activated oxygen species in the assay solution is detected spectrophotometrically by the adrenochrome reaction.

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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 July 29, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 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.
FiledSeptember 18, 1989
GrantedJuly 29, 1997
Term endedJuly 29, 2014
Patent numberCA 1339059 C
Classification (IPC)C12Q1/26 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedSep 18, 1989Patent grantedJuly 29, 1997Term endedJuly 29, 2014

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