Enzymatic process for the conversion of preproinsulins into insulins
CA 2050606 C · Owner: Dorschug, Michael · Inventors: Meiwes, Johannes; Dorschug, Michael; Koller, Klaus-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An enzymatic process for the conversion of preproinsulins into insulins, A process for the specific hydrolysis of the amino-acid chain of preproinsulins to give the corresponding intermediates using clostripain is described and these, intermediates can, where appropriate be converted with, carboxypeptidase B into the corresponding insulins.
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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 September 4, 1991 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 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
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.