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Expired Canadian patentCanada

Isolated components of dense microspheres derived from mammalian brain tissue and antibodies thereto

CA 2175451 C · Owner: Averback, Paul · Inventors: Averback, Paul

CIPO record

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Abstract From the Canadian patent

Dense microspheres (DMS) present in the brain of individuals susceptible to cerebral amyloidosis disintegrate into DMS components to form cerebral amyloid plaques and other DMS components that are removed from the brain via circulating bodily fluids. Detecting the presence of these removed DMS components in circulating bodily fluids provides a diagnostic mechanism to determine the onset of cerebral amyloid plaque formation. Antibodies also can be raised against isolated DMS components and subsequently utilized in a diagnostic method capable of detecting the onset of cerebral amyloid plaque formation.

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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 December 19, 1994 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2016.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 19, 1994
GrantedOctober 31, 2000
Term endedDecember 19, 2014
Patent numberCA 2175451 C
Classification (IPC)C07K16/18 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedDec 19, 1994Patent grantedOct 31, 2000Term endedDec 19, 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.