Process for recovering a dipeptide derivative
CA 1186648 A · Owner: Sagami Chemical Research Center · Inventors: Irino, Shigeaki; Oyama, Kiyotaka; Hagi, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for recovering a dipeptide derivative comprises admixing an organic solvent capable of forming a binary phase system with water with an aqueous mixture containing as a solid component a dipeptide ester derivative of the formula (I), wherein R1 is a lower alkyl group R2 is a side chain group of an amino, acid n is 1 or 2, X is a benzyloxycarbonyl group which can have a nuclear substituent and Y is a hydrogen ion or an ammonium derivative ion of the formula, (II), wherein R3 is a side chain group of an amino acid and R4 is a lower alkyl group, settling the resulting admixture to form (1) an organic solvent phase containing in a solid state a substantial amount of dipeptide …
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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
- Granted May 7, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2002.
- 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.