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Expired Canadian patentCanada

Analytical elements for the analysis of liquids under high ph conditions

CA 1159755 A · Owner: Eastman Kodak Company · Inventors: Sutton, Richard C.; Eikenberry, Jon N.; Sanford, Karl J.

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Abstract From the Canadian patent

Or the Disclosure, An improved analytical element for the detection of a predetermined analyte in an aqueous liquid under highly alkaline conditions is disclosed. The element features a stable alkaline-providing composition. Preferably the analytical element is a multi-zone element. The element is particularly useful in total protein analysis and, when so used, an improved biuret reagent composition for use therein is also provided. Methods of using the aforementioned analytical and biuret reagent composition are also disclosed.

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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 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 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.
FiledDecember 22, 1981
GrantedJanuary 3, 1984
Term endedJanuary 3, 2001
Patent numberCA 1159755 A
Classification (IPC)G01N33/48 +1 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedDec 22, 1981Patent grantedJan 3, 1984Term endedJan 3, 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.