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Expired Canadian patentCanada

Method of assessing rheumatoid arthritis by measuring rheumatoid factor and interleukin-6

CA 2552425 C · Owner: Grunert, Veit Peter · Inventors: Zolg, Werner; Grunert, Veit Peter; Wild, Norbert

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Abstract From the Canadian patent

The present invention relates to a method aiding in the assessment of rheumatoid arthritis. The method especially is used in assessing the absence or presence of rheumatoid arthritis in vitro. It can be best practiced by analyzing biochemical markers, comprising measuring in a sample the concentration of RF and interleukin-6 and correlating the concentrations determined to the absence or presence of rheumatoid arthritis. To further improve the assessment of RA in a method of this invention the level of one or more additional marker may be determined together with RF and interleukin-6 and be correlated to the absence or presence of RA. The invention also relates to the use of a …

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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 February 23, 2005 and granted February 6, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 23, 2005
GrantedFebruary 6, 2018
Term endedFebruary 23, 2025
Patent numberCA 2552425 C
Classification (IPC)G01N33/56

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedFeb 23, 2005Patent grantedFeb 6, 2018Term endedFeb 23, 2025

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