Optical resolution of amino acids into optical antipodes
CA 1110653 A · Owner: Hoechst Aktiengesellschaft · Inventors: Chae, Yung B.; Kim, Dae W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application relates to the optical resolution into optical antipodes of compounds of the formula (I), as well as to salts consisting of an optical isomer of a compound of the above formula and an optical isomer of 2aminobutanol. The optically active compounds of the above formula are employed as starting material for the production of semisynthetic antibiotics of the cephalosporin or penicillin type.
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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 October 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 1998.
- 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.