Esterase genes, esterase, recombinant plasmids and transformants containing the recombinant plasmid and methods of producing optically active carboxylic acids and their enantiomeric esters using said transformants
CA 2068614 C · Owner: Ozaki, Eiji · Inventors: Ozaki, Eiji; Sakimae, Akihiro; Numazawa, Ryozo
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 a DNA fragment containing a nucleotide sequence that encodes an amino acid sequence of esterase sand esterase asymmetrically hydrolyzing carboxylic acid esters represented by the formula (I);, (wherein R1 is alkyl aralkyl or aryl, R2 and R3 are alkyl, and n is 1 or 2) an esterase encoded by the DNA fragment a recombinant plasmid, containing the DNA fragment a microorganism transformed with the, recombinant plasmid and methods of producing optically active carboxylic acids and their enantiomeric esters.
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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 May 13, 1992 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2014.
- 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.