Method for the purification of dicarboxylic acids produced by fermentation
CA 1136159 A · Owner: Bio-Research Center Company, Ltd. · Inventors: Taoka, Akira; Watanabe, Akio; Uchida, Seiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Long-chain dicarboxylic acids especially those, produced by fermentation are purified by a process involving, dissolving the acid on a salt thereof in a lower aliphatic alcohol, tetrahydrofuran or aqueous solutions thereof and, removing insolubles from the solution so formed.
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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- 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.