Piperidylthiocarbapenem derivatives
CA 2022382 A1 · Owner: Fukatsu, Hiroshi · Inventors: Fukatsu, Hiroshi; Nakagawa, Susumu; Kato, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the general formula (I): (I), wherein R1 is a hydrogen atom or a methyl group; R2 and R3 which may be the same or different, each represents a hydrogen atom or a lower alkyl group, or taken together with the adjacent nitrogen atom, jointly represent a heterocyclic group selected from the group consisting of an aziridinyl group an, azetidinyl group, a pyrrolidinyl group a piperidino group, a, piperazinyl group a 4-lower alkylpiperazinyl group, a, morpholino group and a thiomorpholino group; and A is a single bond, a lower alkylene group, a lower alkenylene group or a lower alkynylene group; or a pharmaceutically acceptable salt or ester thereof. The compound of the …
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 July 31, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2012.
- 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.