Expired Canadian patentCanada
Process for preparing l-amino acids by transamination
CA 1291925 C · Owner: Then, Johann · Inventors: Voelskow, Hartmut; Then, Johann; Deger, Hans-Matthias
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The yield of L-amino acids by transamination of .alpha.-keto acids by means of microorganisms can be substantially increased by passing in a gas.
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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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.
FiledApril 23, 1987
GrantedNovember 12, 1991
Term endedNovember 12, 2008
Patent numberCA 1291925 C
Classification (IPC)C12P13/04 +2 more
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.