Novel strains of escherichia coli, methods of preparing the same and use thereof in fermentation processes for l-threonine production
CA 2262813 C · Owner: Wang, Ming-Der · Inventors: Swisher, Stacia L.; Bradshaw, Jill S.; Binder, Thomas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel strains of Escherichia coli and fermentation processes involving these microorganisms. More specifically the , present invention relates to genetically-modified Escherichia coli strains and the use thereof for the production of the amino acids particularly members of , the aspartate family of amino acids such as threonine. The present invention also relates to methods of preparing E. coli strains for use in the fermentative production of amino acids.
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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 July 30, 1997 and granted September 13, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2019.
- 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
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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.