Process for producing n-substituted polyhydroxy nitrogen-containing heterocycles
CA 2091668 C · Owner: Monsanto Company · Inventors: Scaros, Mike G.; Landis, Bryan H.; Rutter, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing N-substituted amino compounds, a process for oxidizing an N-substituted amino compound with a microbe, or cell fragment or cell free extract thereof, and a process for oxidizing an Nsubstituted amino compound with a microbe or cell, fragment or cell free extract thereof and reducing the oxidized N-substituted amino compound to N-substitutedpolyhydroxy piperidines based on N-substituted mannosamines, allosamines and altrosamines N-, substituted polyhydroxy pyrrolidines and N-substituted, polyhydroxy azetidines. In addition a one pot process, for producing N-substituted-polyhydroxy piperidines based on N-substituted mannosamines, allosamines and altrosamines, …
Read the whole patent
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 March 15, 1993 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2015.
- 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.