Derivatives of cyclobutene-3,4,-dione as intermediates for certain histamine h.sub.2- antagonists
CA 1190225 A · Owner: Bristol-Myers Company · Inventors: Algieri, Aldo A.; Crenshaw, Ronnie R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain compounds of the formula -IMAGE- III, are useful as intermediates of certain 1-(substituted amino) -2-(amino or substituted amino) cyclobutene-3,4-diones. The latter are histamine H2-antagonists useful in the treatment of peptic ulcers.
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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 July 9, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2002.
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