Oxetane derivatives, their preparation and their use as anti-fungal or fungicidal agents
CA 2031635 A1 · Owner: Oida, Sadao · Inventors: Oida, Sadao; Kajino, Hisaki; Konosu, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I): (I), in which: R1 and R2 are hydrogen or alkyl or, together are cycloalkyl; R3 and R4 are hydrogen alkyl or phenyl, or together are cycloalkyl; or R1 and R3 together are cycloalkyl fused to the oxetane ring; Ar is phenyl substituted by R5, R6 and R7 where, R5, R6 and R7 are hydrogen, halogen alkyl, alkoxy, halogenated alkyl or halogenated alkoxy; and R8 and R9 are hydrogen or alkyl and salts thereof have valuable agricultural and pharmaceutical anti-fungal or fungicidal activity. They may be prepared by a variety of processes.
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
- Filed December 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2012.
- 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.