Microbiological process for the production of 6-hydroxypicolinic acid
CA 2060534 C · Owner: Kiener, Andreas · Inventors: Heinzmann, Klaus; Kiener, Andreas; Glockler, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microbiological process is disclosed for the production of 6-hydroxypicolinic acid starting from picolinic acid and/or a salt thereof. The concentration of picolinic acid and/or salt thereof is selected so that the 6-hydroxypicolinic acid is not further metabolized upon formation. The process is performed either by using microorganisms of the genus Pseudomonas Bacillus, Alcaligenes, Aerococcus, or Rhodotorula or with a biomass, able to use picolinic acid and grow with picolinic acid as the sole carbon, nitrogen and energy source.
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 February 3, 1992 and granted April 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 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.