Microbiological process for hydroxylation of nitrogen-heterocyclic-carboxylic acids
CA 2091005 C · Owner: Lonza Ltd. · Inventors: Kiener, Andreas; Tschech, Andreas; Tinschert, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microbiological process for the production of hydroxy-substituted nitrogen-containing heterocyclic carboxylic acids of the general formula: (see formula I), and the soluble salts thereof where R1 and R2 are the same, or different and each represents a hydrogen atom a halogen, atom or a C1-C4 alkyl group and X is a nitrogen atom or a, CR3 group where R3 is a hydrogen atom or a halogen atom. The process uses the corresponding nitrogen-containing heterocyclic carboxylic acids as a starting material. Microorganisms suitable for use in the process are also described.
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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
- Filed March 4, 1993 and granted September 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2015.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.