Method for quantitatively measuring sugar-alcohol, column and kit therefor
CA 2014133 C · Owner: Takezawa, Tomoko · Inventors: Hirayama, Masachika; Hayami, Hiroshi; Tajima, Shigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A present invention relates to a method for quantitatively determining sugar-alcohols characterized by passing test samples containing sugar-alcohols proteins, and, saccharides through a column filled with basic anion-exchange resins which have a protein-removing ability and a saccharideremoving ability, and then quantitaing the sugar-alcohols in the effluent out of the column, a column filled with said resins and an aqueous solution of boric acid and a kit. Sugar-alcohols such as 1,5-anhydroglucitol and the like have been calling attention as markers for diabetes mellitus recently.
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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
- Filed April 9, 1990 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.