Use of 2h-1,2,4-benzothiadiazine-3(4h)-thione 1,1-dioxides as antiviral medicaments
CA 2096239 A1 · Owner: Leinert, Herbert · Inventors: Mertens, Alfred; Leser, Ulrike; Zilch, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
14-, Summary, ABSTRACT, The invention concerns the new use of compounds of the formula I, (I), in which R1 signifies a hydrogen atom a C1-C6-alkyl, radical or a phenyl radical possibly substituted by C1-C6-alkyl, R2 - R4 are the same or different and independently of one another signify a hydrogen or halogen atom, a C1-C6-alkyl, C6-C6-alkoxy tri-, fluoromethyl or aminosulphonyl radical and R a hydrogen atom, a C1-C6-alkyl or phenyl-C1-C6-alkyl group, or of their tautomers for the production of medicaments for the treatment of viral or retroviral infections.
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 November 14, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- 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.