Method for preparing 2'-(carboxymethoxy)-chalcones
CA 1084064 A · Owner: Taisho Pharmaceutical Co. Ltd. · Inventors: Hatayama, Katsuo; Yokomori, Sadakazu; Sawada, Jiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of the chalcone series of formula, (I), wherein one to two of X1 X2 and X3 are chosen from hydrogen and 3methyl-2-butenyloxy, provided that X1, X2 and X3 are not all hydrogen. The compounds produced by the process of the invention exhibit antigastric and antiduodenal ulcer activity.
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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
- 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.