Use of 2-iminothiazolidin-4-one derivatives as novel pharmaceutical active ingredients
CA 2065798 A1 · Owner: Feige, Ulrich · Inventors: Missbach, Martin; Feige, Ulrich; Ferrini, Pier Giorgio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-18612/A, Use of 2-iminothiazolidin-4-one derivatives as novel pharmaceutical active ingredients Abstract, Compounds of the formula I, (I) in which R1 is lower alk-2-en-1-yl, lower alk-3-en-2-yl lower alk-2-yn-1-yl or lower alkyl, substituted in the 2,3-position by radicals which can be eliminated to give a double bond R2 is hydrogen and R3 is methyl which is unsubstituted or substituted by radicals which can be eliminated together with hydrogen R2 to give a double bond or R2 and R3 are both hydrogen or lower alkyl or are together methylene and R4 is a group of the formula Ia Ib, or Ic, in which R5 is hydrogen, lower alkyl lower alk-2-en-1-yl or lower alk-2-yn-1-yl and R6 is a group of the …
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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 April 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2014.
- 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.