Process for producing optically active norborneol
CA 2101945 C · Owner: Kawata, Kyozo · Inventors: Sonoyama, Takayasu; Kageyama, Bunji; Nakae, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing optically active norborneol comprising the step of bringing a (~)-exo-norbornane type ester represented by formula (I) into contact with a microorganism, which may be optionally treated, selected from among those belonging to the genera Pseudomonas, Acetobacter, Arthrobacter Rhodotorula and, Saccharomyces. A simple post-treatment of the product gives rise to highly pure (+)- and/or (-)-exo-norbornane type alcohol in high yields.
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 December 4, 1992 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 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
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.