Cholesterol esterases with variable substrate specificity
CA 2064202 A1 · Owner: Fischer, Stephan · Inventors: Hanke, Christian; Fischer, Stephan; Schumacher, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cholesterol esterases with variable substrate specificity are made by cloning of a cholesterol esterase gene whose active centre contains the sequence -Gly-His-Ser-X-Gly where X stands for an, amino acid, in a vector transformation of a microorganism with this vector and expression of the cholesterol esterase gene. The amino acid X of the active centre is interchanged with another amino acid by mutagenesis.
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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 June 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2013.
- 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.