Piperazine and homopiperazine derivatives, pharmaceutical compositions containing them and process for preparing the same
CA 2098562 A1 · Owner: Fittler, Zsuzsanna · Inventors: Andrasi, Ferenc; Goldschmidt, Katalin; Sutka, Klara
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Institute for Drug Research, Budapest, Abstract This invention relates to novel compounds of the general formula (I) and the pharmaceutically acceptable acid addition salts thereof. In the general formula (I), (I) Lip stands for hydrogen; C10-20 alkyl; C10-20 alkanoyl or C10-20 alkenoyl; trityl optionally substituted by halogen; adamantyl; 1- or 2-naphthyloxy or oxo-substituted tetrahydronaphthyloxy; or an amine protective group commonly used e.g. in the peptide chemistry; A1 and A2 are selected independently from the group consisting of a single bond and C2-3 alkylene optionally substituted by hydroxy or oxo;, n is 1 or 2; and, Het represents a group of the general formula (a), (a) …
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 June 16, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2015.
- 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.