Polyether antibiotics x-14889 a, c and d
CA 1252404 A · Owner: Hoffmann-La Roche Limited/Hoffmann-La Roche Limitee · Inventors: Liu, Chao-Min; Westley, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are presented antibiotic compounds designated as Antibiotics X-14889 A, C and D of the formulas I, wherein (for X-14889A) R1 is methyl R2 is methyl, R3 is hydrogen, R4 is methyl and R5 is hydrogen or (for X-14889C) R1 is hydrogen, R2 is methyl R3 is hydrogen, R4 is methyl and R5 is CO2H or, II, (X-14889 D), and the pharmaceutically acceptable salts thereof. The compounds exhibit antimicrobial activity and one of the compounds X-14889C also exhibits activity against Treponema hyodysenteriae (in vitro), Plasmodium berghei and as food efficiency enhancers in ruminants. Also presented is a process to produce the above compounds and another known component Antibiotic X-14889B.
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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 April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.