Method of crystallizing aspartame
CA 2068279 C · Owner: Ebisawa, Kazuyoshi · Inventors: Kumon, Satoshi; Ebisawa, Kazuyoshi; Nagashima, Nobuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aspartame, crystallized in the presence of a crystal growth inhibitor comprising one or more of dipeptides amino, acids, saccharides, organic acids and inorganic salts has a, thick and firm crystal habit. The crystals may be easily separated by solid-liquid separation, and the drying load of them is low. After being dried, the dried aspartame powder may be handled with ease and it has excellent powdery characteristics.
Read the whole patent
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 May 8, 1992 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2014.
- 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.