Urease inhibitors
CA 2400527 A1 · Owner: Otsuka Pharmaceutical Co. Ltd. · Inventors: Kajiwara, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Urease inhibitors and drugs against Helicobacter pylori which contain as the , active ingredient, isothiazole derivatives represented by the following general formula (1) wherein R1 represents hydrogen or amino; R2 represents hydrogen, lower alkyl or acetyl; and X represents carbon or nitrogen. These drugs are efficacious in preventing and treating gastrointestinal diseases caused by urease of Helicobacter pylori such as chronic gastritis and gastroduodenal ulcer.
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 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2023.
- 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.