Method for purifying n-benzyloxycarbonyl aspartic acid
CA 1193279 A · Owner: Ppg Industries Ohio, Inc. · Inventors: Sathe, Avinash T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
OF DISCLOSURE, N-benzyloxycarbonyl aspartic acid containing minor contaminating amounts of N-benzyloxycarbonyl aspartyl aspartic acid is purified by subjecting the impure material to alkaline hydrolysis at a pH of at least 10 and at temperatures of from 20°C. to 100°C. preferably 65°C. to 85°C. for a time sufficient to hydrolyze substantially all of the N-benzyloxycarbonyl aspartly aspartic acid impurity therein. N-benzyloxycarbonyl aspartic acid containing less than 0.2 weight percent of the impurity can be obtained by such treatment.
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 September 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 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.