Process for the preparation of aspartame and agents for carrying it out
CA 1295785 C · Owner: Keller, Reinhold · Inventors: Platen, Martin; Schlingmann, Merten; Keller, Reinhold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dipeptide alkyl esters whose alkyl group contains 3 to 7 carbon atoms can be converted to the corresponding methyl ester compound by a rapid, gentle transesterificaiton in anhydrous methanol in the presence of an alkali metal alcoholate, without racemization occurring on the two chiral carbon atoms.
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
- Granted February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- 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.