Stable salts of 4"-deoxy-4" epi-methylamino avermectin bla/blb
CA 2045864 C · Owner: Merck Sharp & Dohme Corp. · Inventors: Cvetovich, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain salts of 4"-deoxy-4"-epi-methylamino avermectin B1a/B1b such as: the benzoic acid salt gallic acid salt, citric acid salt, benzenesulfonic acid salt and salicyclic acid salt, phosphoric acid salt, tartaric acid salt ar maleic acid salt exhibit, enhanced stability, a property which serves to provide greater shelf life and a product of greater safety for the user and the environment.
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 June 27, 1991 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2013.
- 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.