Chemically modified subtilisin mutants
CA 2273079 C · Owner: Governing Council Of The University Of Toronto · Inventors: Jones, J. Bryan; Graycar, Thomas P.; Bott, Richard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Modified enzymes are provided in which at least one amino acid such as , asparagine, leucine, methionine or serine of an enzyme is replaced with a , cysteine and the thiol hydrogen is replaced with a substituent group providing a thiol side chain selected from the group consisting of: a) -SR1R2 wherein , R1 is an alkyl and R2 is a charged or polar moiety; b) -SR3 wherein R3 is a , substituted or unsubstituted phenyl; c) -SR4 wherein R4 is substituted or , unsubstituted cyclohexyl; d) -SR5 wherein R5 is C10-C15 alkyl; and e) -SR6 wherein R6 is a C1-6 alkyl. Also, methods of producing the modified enzymes are provided, as well as detergent and feed additives and a composition for the …
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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 November 24, 1997 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 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
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.