Process for producing 1,4-dihydoxy-2-naphthoic acid
CA 2540507 C · Owner: Meiji Dairies Corporation · Inventors: Yoda, Nobuo; Furuichi, Keisuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing 1, 4-dihydroxy-2-naphthoic acid comprising initiating the culture of, 1 4 -dihydroxy-2-naphthoic acid producing bacteria belonging to propionic acid bacteria under anaerobic conditions and culturing the bacteria under aeration into a medium when the concentration of a carbon source in the medium is 3.5% by mass or less.
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 September 30, 2004 and granted September 29, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2026.
- 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.