7.alpha.-METHOXYCEPHALOSPORIN DERIVATIVE AND PROCESS FOR PRODUCING THE SAME
CA 1134816 A · Owner: Meiji Seika Kaisha, Ltd. · Inventors: Seki, Shigeo; Yamada, Yujiro; Inoue, Shigeharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A 7a-methoxycephalosporin derivative represented by the formula (I):, (I), wherein R1 represents a heterocyclic ring or an -S- heterocyclic ring; R2 represents a hydrogen atom a carboxy group or, a -COOR5 group wherein R5 represents a lowker alkly group a, dialkylamino-lower alkyl group or a group wherein R6, represents a lower alkyl group a lower acyl group or a lower, alkoxycarbonyl group and Y represents a hydrogen atom or a lower alkyl group; R3 represents a hydrogen atom a carbamoyl group, or a lower acyl group; R4 represents a hydrogen atom a lower, alkyl group, a dialkylamino-lower alkyl group or a group wherein R6 and Y are defined as above; A and B which may, be the same or …
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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
- Granted November 2, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 1999.
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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.