Crystalline y-form bestatin and processes for its preparation
CA 1280550 C · Owner: Ishizuka, Masaaki · Inventors: Umezawa, Hamao; Ishizuka, Masaaki; Terada, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stable, non-hygroscopic, crystalline y-form of bestatin is prepared from the .alpha.- or .beta.-form of bestatin by heating at a temperature of from about 148°C to the melting point of bestatin, or by suspending or kneading in certain specified solvents.
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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2008.
- 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.