Cephalosporin analogs
CA 1160584 A · Owner: Kyowa Hokko Kogyo Co, Ltd. · Inventors: Sato, Kiyoshi; Hirata, Tadashi; Suzuki, Fumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are optically active cephalosporin analogs of the general formula:, wherein R1 represents a hydrogen a lower alkyl group or a, lower acyl group and R2 represents a hydrogen or a protective group of carboxylic acid and the salts thereof. The compounds are useful as intermediates in the preparation of optically active acylated antimicrobial agents.
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
- Granted January 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.