Catechol derivatives, a process of preparation thereof, and therapeutical compositions containing the same
CA 1318686 C · Owner: Bonato, Marc · Inventors: Bonato, Marc; Follet, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to catechol derivatives having the general formula, wherein R represents various substituents to a process for, the preparation of the same comprising reacting S-(3,4-dihydroxyphenyl)-isothiourea, which has the formula II with a tosylate of the general formula III II III, and to therapeutical compositions wherein the active ingredient is one of these compounds.
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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 June 1, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 1, 2010.
- 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.