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Expired Canadian patentCanada

Process for preparing a cell suspension from blood for discrimination of white blood cells & platelets from other blood particles

CA 1085280 A · Owner: Technicon Instruments Corporation · Inventors: Kim, Young R.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Procedures are disclosed for obtaining white blood cell counts and platelet counts by light scattering measurements in which anticoagulated blood samples are treated such that the morphology of the white cells (leukocytes) and platelets remain intact and permit the discrimination of platelets from white cells and of most classes of white cells from one another and their counting without the need for staining.

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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 September 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 1997.
  • 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 22, 1978
GrantedSeptember 9, 1980
Term endedSeptember 9, 1997
Patent numberCA 1085280 A
Classification (IPC)G01N33/48 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 22, 1978Patent grantedSep 9, 1980Term endedSep 9, 1997

Sources & verification

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