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Expired Canadian patentCanada

Interactive automated cytology method and system

CA 2132269 C · Owner: F. Hoffmann-La Roche Ag · Inventors: Knesel, Ernest Arthur; Van Nguyen, Thanh; Fischer, Jochen Ernst

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Abstract From the Canadian patent

An automated interactive cytology system provides expedited handling of samples, minimizing false negatives while not, substantially increasing the number false positives. A computerized system identifies and displays the cells which are of greatest interest to the cytologist. The system then processes this information on all cells identified to classify the slide as normal abnormal, or, questionable based on a statistical analysis of cells meeting given criteria. Before displaying the results of the statistical analysis a, cytologist reviews the cells which the computer has determined to be most significant. It is only then after the cytologist has determined whether the cells are …

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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 September 16, 1994 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2014.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 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.
FiledSeptember 16, 1994
GrantedFebruary 1, 2000
Term endedSeptember 16, 2014
Patent numberCA 2132269 C
Classification (IPC)G01N33/48 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedSep 16, 1994Patent grantedFeb 1, 2000Term endedSep 16, 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.