Avermectin derivatives
CA 2418975 C · Owner: Sunazuka, Toshiaki · Inventors: Omura, Satoshi; Sunazuka, Toshiaki; Nagai, Kenichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the general formula (I) or a salt thereof: (see formula I), wherein, -X~Y- represents -CH=CH- -CH2-CH2- or the like, ~ between R1 and the carbon atom at 4'-position represents a single bond or a double bond ~ , between R2 , and the carbon atom at 5-position represents a single bond or a double bond and for , example, 1) when -X~Y represents -CH=CH- or -CH2-CH2and ~ between R1 and , the carbon atom at 4'-position represents a double bond R1 represents , =C(R11)(R12) , (wherein R11 represents a lower alkyl group or the like and R12 represents a hydrogen , atom or the like) or the like and R2 represents a hydroxyl group or the like or R2 , may be combined together …
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 August 8, 2001 and granted January 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2023.
- 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.