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Expired Canadian patentCanada

Method for ascertaining the history of a condition of the body from a single blood sample

CA 1340365 C · Owner: Saunders, Alexander M. · Inventors: Saunders, Alexander M.

CIPO record

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

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Abstract From the Canadian patent

A historical time series analysis is obtained from a single sample of blood by measurement of hemoglobin and an altered hemoglobin, for example glycohemoglobin, on a cell-by-cell basis. The results are compared by ratio of glycohemoglobin to hemoglobin on a cell-by-cell basis. Since the alteration of hemoglobin is continuous and irreversible the ordered, set of ratios represents a time-series of the cells and any deviation from normal will be readily apparent. A time-series can also be derived for other constituents, the time-series representing historical data of the other constituents in the person from whom the blood sample was taken.

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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 2, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 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.
FiledMarch 16, 1989
GrantedFebruary 2, 1999
Term endedFebruary 2, 2016
Patent numberCA 1340365 C
Classification (IPC)C12Q1/00 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMarch 16, 1989Patent grantedFeb 2, 1999Term endedFeb 2, 2016

Sources & verification

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