2-(2-cyclopropylpyrrolidin-4-ylthio) carbapenem derivatives
CA 2033390 A1 · Owner: Ushijima, Ryosuke · Inventors: Nakagawa, Susumu; Yamada, Koji; Ushijima, Ryosuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula:, (I) wherein R1 is a hydrogen atom or a methyl. group each of, R2 and R3 which may be the same or different is a, hydrogen atom or a lower alkyl group or R2 and R3 form, together with the adjacent nitrogen atom a heterocyclic group selected from the group consisting of an aziridinyl group, an azetidinyl group, a pyrrolidinyl group a, piperidino group, a piperazinyl group and a morpholino group, A is a carbonyl group or a single bond and n is, an integer of from 0 to 3, or a pharmaceutically acceptable salt or ester thereof.
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 December 28, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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.