Process of producing 2-azetidinone-4-substituted compounds, and medicaments containing the compounds
CA 1259319 A · Owner: Astellas Pharma Inc. · Inventors: Yamamoto, Minoru; Iwamoto, Hidenori; Tamura, Toshinari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel 4-substituted-2-azetidinone compound shown by the general formula:, and salts thereof. The compounds of this invention have a strong CNS activity and are useful for improving a disturbance of consciousness in shizophrenia, a head injury etc. or improving, hypobulial memory loss etc.
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 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 12, 2006.
- 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.