Derivatives of 3' - and 3" -o-desmethyl avermectin compounds
CA 2006198 A1 · Owner: Mrozik, Helmut · Inventors: Linn, Bruce O.; Mrozik, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
0086/DLR8, 17443, TITLE OF THE INVENTION DERIVATIVES OF 3'- AND 3"-O-DESMETHYL AVERMECTIN COMPOUNDS, ABSTRACT OF THE DISCLOSURE, There are disclosed derivatives of avermectin compounds wherein one or both of the 13-oleandrose saccharide groups lack the methyl group of the 3'- or 3"-methoxy. Such compounds are potent anthelmintic and antiparasitic agents.
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 20, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- 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.