Aminoalkylpyrrolidinylthiocarbapenem derivatives
CA 2083980 C · Owner: Okamoto, Osamu · Inventors: Murase, Satoshi; Yamada, Koji; Fukatsu, Hiroshi
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:, (see formula I) wherein R1 is a hydrogen atom or a methyl group R2 is a, hydrogen atom or a negative charge R3 is a hydrogen, atom, a halogen atom a hydroxyl group, a lower alkoxy, group a lower alkanoyloxy group, an amino group an N-, lower alkylamino group, an N,N-di-lower alkylamino group a lower alkanoylamino group, an aroylamino group a, (lower alkylsulfonyl)amino group, a sulfamoylamino group a cyano group, a nitro group, a group of -COOR4 (wherein R4 is a hydrogen atom or a lower alkyl group) or a group of -CON(R5)R6 (wherein 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 …
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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 November 27, 1992 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2014.
- 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.