Process for purifying tryptophan
CA 1267652 C · Owner: Miyahara, Tooru · Inventors: Nitta, Kazunari; Miyahara, Tooru; Miyahara, Shoichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for purifying tryptophan so as to contain almost no unreacted indole and a process for recovering unreacted indole with a very high percentage are provided the, purification process comprising passing a reaction fluid of . tryptophan prepared from indole as raw material by means of an enzyme function, through a porous type cation exchange resin, layer, to cause the ion exchange part of the resin to adsorb tryptophan, while to cause the porous part of the resin to adsorb indole, followed by eluting only the tryptophan with an alkali or acid aqueous solution, and the recovery process comprising subjecting tryptophan to repeated treatments of adsorption onto and elution from the ion …
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.