.alpha.-amylase activity inhibitor
CA 2402893 C · Owner: Aiyama, Ritsuo · Inventors: Nagaoka, Masato; Makino, Takashi; Watanuki, Masaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An .alpha.-amylase activity inhibitor containing as the active ingredient polyphenols which are obtained by extracting guava leaves and/or fruits with one or more solvents selected from among water and hydrophilic solvents eliminating materials having molecular weight less than 5,000 by ultrafiltration, using hydrophobic chromatography with the use of a packing carrying butyl as the solid phase, eluting under stepwise concentration gradient of a 0.02 mol/L aqueous solution of monosodium dihydrogenphosphate and a 0.02 mol/L aqueous solution of trisodium phosphate at a flow rate of 1 mL/min, and then collecting a fraction recognized as the third single peak in case of measuring the …
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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 March 9, 2001 and granted January 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2023.
- 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.