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Expired Canadian patentCanada

Method and apparatus for measuring mean cell volume of red blood cells

CA 1161271 A · Owner: Rush-Presbyterian-St. Luke'S Medical Center · Inventors: Bacus, James W.

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Abstract From the Canadian patent

An apparatus and method are provided for producing signals representative of the mean cell volume of red blood cells in a blood specimen. The apparatus includes means (310) for generating signals representative of the area of the cells and means (318) for measuring the optical density of the individual cells and for generating signals representative of the hemoglobin content or mass of the cells. The central pallor is measured for cells having central pallors and means (264) generate a signal representative of the central pallor of these cells. The representative area signals, hemoglobin signals and central pallor signals are sent to a means (403, 415) which generates an output (430) …

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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 January 31, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 21, 1981
GrantedJanuary 31, 1984
Term endedJanuary 31, 2001
Patent numberCA 1161271 A
Classification (IPC)G01N21/17 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedApril 21, 1981Patent grantedJan 31, 1984Term endedJan 31, 2001

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