Glycyrrhizin high-concentration preparation
CA 2534259 C · Owner: Hanaoka, Satoshi · Inventors: Yoshikawa, Taro; Hanaoka, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROBLEMS To provide a glycyrrhizin/aminoacetic acid/cysteine combination drug, containing an active ingredient in high concentration and excelling in stability and safety. MEANS FOR SOLVING PROBLEMS Stability at compounding of active ingredient in high concentration has been improved by avoiding the addition of sulfite salts having, been used as a stabilizer in existing products. As glycyrrhizin highconcentration, preparations, there is provided a drug composition comprising 8 to 16 mg/mL of glycyrrhizin, 3 to 6 mg/mL of cysteine and 80 to 160 mg/mL of aminoacetic acid wherein, no sulfite salts are added as an additive.
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 August 10, 2004 and granted April 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 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.