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Expired Canadian patentCanada

Immuno chemical determination using non-metallic sol labelling

CA 1340893 C · Owner: H.B.T. Holland Biotechnology B.V. · Inventors: Van Gelder, Wilhelmus Martinus Jozef; Wichers, Jan Herman; Van Doorn, Albert Willem Jacob

CIPO record

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Abstract From the Canadian patent

The invention relates to a method of determining immunochemically reactive components, using one or more labelled components obtained by coupling the component concerned directly or indirectly to a sol of a non-metallic element (such as Se, Te, S, P, C, Si) or an inorganic compound thereof which does not contain metallic elements (such as SiO2). The invention also relates to a method of preparing such a labelled component, as well as to a material thus labelled per se, and to a test kit containing such a labelled component.

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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 February 8, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 8, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 17, 1988
GrantedFebruary 8, 2000
Term endedFebruary 8, 2017
Patent numberCA 1340893 C
Classification (IPC)C12Q1/68 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007201020132016Application filedNov 17, 1988Patent grantedFeb 8, 2000Term endedFeb 8, 2017

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