Carboxylic acid derivatives
CA 2001436 C · Owner: Glaxo Group Limited · Inventors: Clitherow, John Watson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to salts formed between basic H2-receptor antagonists and a complex of bismuth with a carboxylic acid, and solvates of such salts excluding, salts in which the basic H2-receptor antagonist is ranitidine. Examples of suitable carboxylic acids are citric acid and tartaric acid. Examples of basic H2-receptor antagonists are cimetidine sufotidine famotidine, and nizatidine. The salts are useful in the treatment of gastrointestinal disorders, particularly gastroduodenal conditions. The salts show the antisecretory activity associated with the basic H2-receptor antagonist together with antibacterial activity against Campylobacter pylori and they also possess cytoprotective …
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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 October 25, 1989 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2011.
- 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.