Process for producing ketals of 2-ketogulonic acid or its esters
CA 1236457 A · Owner: Takeda Chemical Industries, Ltd. · Inventors: Matsumura, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel process is disclosed for production of ketals of 2-ketogulonic acid or of its esters which, comprises reacting 2-ketogulonic acid or its esters with a ketone in the presence of a ketal formation catalyst. The process is advantageous from the industrial point of view to give ketals of 2-ketogulonic acid or of its esters.
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 May 10, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2005.
- 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.