Method for preparing crystal of aspartame derivative excellent in stability
CA 2348162 A1 · Owner: Ajinomoto Co. Inc. · Inventors: Nagashima, Kazutaka; Takemoto, Tadashi; Kishishita, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing the A type crystal of N-(3,3-dimethylbutyl)-APM being excellent in stability, which comprises holding the B type crystal thereof under a controlled circumstance of an absolute humidity of 0.203 kg/kg or lower and a material temperature of 25 to 80 ~C to thereby cause crystal , transition; and a method for preparing the A type crystal of N-(3,3dimethylbutyl)-APM comprising holding the D type crystal thereof under a controlled circumstance of an absolute humidity of 0.0550 kg/kg or lower and a material temperature of 25 to 80 ~C, to thereby cause crystal transition. These crystal transition methods allow the preparation of a crystal excellent in stability with a …
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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 November 1, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2021.
- 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
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.