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Expired Canadian patentCanada

Analysis of circulating tumor cells, fragments, and debris

CA 2457894 C · Owner: Johnson & Johnson · Inventors: Gross, Steven; Rutner, Herman; Larson, Christopher

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Abstract From the Canadian patent

The methods and reagents described in this invention are used to analyze circulating tumor cells, clusters, fragments and debris. Analysis is , performed with a number of platforms including flow cytometry and the , CellSpotter®* fluorescent microscopy imaging system. Analyzing damaged cells has shown to be important. However there are two sources of damage: in , vivo and in vitro. Damage in vivo occurs by apoptosis necrosis, or immune , response. Damage in vitro occurs during sample acquisition handling, transport, processing, or analysis. It is therefore desirable to confine reduce, eliminate, or at least qualify in vitro damage to prevent it from interfering in analysis. Described …

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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 23, 2002 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2024.
  • 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 23, 2002
GrantedJuly 8, 2014
Term endedAugust 23, 2022
Patent numberCA 2457894 C
Classification (IPC)C12Q1/04 +2 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedAug 23, 2002Patent grantedJuly 8, 2014Term endedAug 23, 2022

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