ANTIBIOTICS AND DERIVATIVES THEREOF HAVING .beta.-LACTAMASE INHIBITORY ACTIVITY AND PRODUCTION THEREOF
CA 1113872 A · Owner: Sanraku-Ocean Co. Ltd. · Inventors: Fukagawa, Yasuo; Kouno, Kageaki; Okamura, Kazuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel antibiotic substance of the formula (I), wherein R1 is CH3 and R2 is -CH2-CH2- or R1 is H and R2 is -CH-CH; and R3 represents hydrogen lower alkyl or triphenylmethyl, and including the salts of the compound of formula (I) wherein R3 is hydrogen, said antibiotic substance having strong antibiotic activity and .beta.-lactamame inhibiting effect and a method for producing the same by aerobic cultivation of Streotomyces A271.
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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 1998.
- 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.