Novel steroids with pregnane skeleton, pharmaceutical compositions containing them and process for preparing same
CA 2136546 A1 · Owner: Mezei, Anna B. · Inventors: Szporny, Laszlo; Maho, Sandor; Gorog, Sandor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel, therapeutically active 21-aminosteroids of formula (I) with pregnane skeleton wherein two, of X, Y and Z mean a nitrogen atom each and the third one is a methine group; R1 and R2 represent independently from each, other, a primary amino group bearing as substituent a branched-chain C4-8alkyl -alkenyl or -alkynyl group, or a C4-10cycloalkyl group comprising 1 to 3 ring(s) and being optionally substituted by C1-3alkyl group(8); or R1 and R2 stand together for a spiro-heterocyclic secondary amino group containing at most 10 carbon atoms and optionally at least one oxygen atom as additional heteroatom; or one of R1 and R2 means an unsubstituted heterocyclic …
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 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 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.