2-(substituted pyrrolidinylthio) carbapenem derivatives
CA 2038828 C · Owner: Murase, Satoshi · Inventors: Ushijima, Ryosuke; Nakano, Fumio; Nakagawa, Susumu
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 R is a hydrogen atom or a methyl group R1 is a, hydrogen atom or a negative charge each of R2 and R3, which may be the same or different is a hydrogen atom, a, lower alkyl group a hydroxy lower alkyl group, a, formimidoyl group an acetoimidoyl group, -COOR4, -CON(R5)R6 -N(R5)R6, -CH2COOR4, -CH2N(R5)R6 or, -CH2CoN(R5)R6 (wherein R4 is a hydrogen atom or a lower alkyl group, each of R5 and R6 which may be the same or different, is a hydrogen atom or a lower alkyl group or, R5 and R6 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 and …
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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 March 22, 1991 and granted September 24, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2013.
- 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
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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.