Substituted 3,4-diamino-1,2,5-thiadiazoles having histamine h -receptor antagonists activity
CA 1297875 C · Owner: Crenshaw, Ronnie R. · Inventors: Crenshaw, Ronnie R.; Algieri, Aldo A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Histamine H2-receptor antagonists of the formula I, wherein A, m, Z, n and R1 are as defined herein and their, nontoxic pharmaceutically acceptable salts are novel anti-ulcer agents which are prepared by ring closure of a substituted ethanediimidamide of the formula, II
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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
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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
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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.