Reduction giving 3-cephem compounds
CA 1069119 A · Owner: Shionogi And Co. Ltd. · Inventors: Narisada, Masayuki; Hamashima, Yoshio; Okada, Kyo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial cephems having following formula: (wherein A is amino or substituted amino; COB is carboxy or protected carboxy; R is two hydrogens, hydrogen and a monovalent substituent, or a divalent substituent; and n is zero or one) are prepared by reducing a compound having following formula: (wherein A, COB, R, and n are defined above and X is halo or sulfonyloxy) with a reducing reagent.
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 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.