Topical formulations containing polymeric material
CA 2267617 C · Owner: Williams, James B. · Inventors: Choi, Hoo-Kyun; Williams, James B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A topical formulation for direct application to the skin of an animal effective for treatment and prevention of ectoparasitic and endoparasitic infestations for four weeks consists of from about 0.01 to about 20% w/v of a polymeric material from about 1 to about 95% v/v of ethanol 100% v/v obtained with addition of water and from about 0.05 to about 10% w/v of an avermectin compound having the formula: where the broken line indicates a single or a double bond at the 22,23- positions; R1 is hydrogen or hydroxy provided that R1 is presently only when the broken line indicates a single bond; R2 is alkyl of from 1 to 6 carbon atoms or alkenyl of from 3 to 6 carbon atoms or cycloalkyl of from 3 …
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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
- Filed April 28, 1994 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2016.
- 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.