Compositions containing a 4-quinolone derivative complexed with a divalent metal ion
CA 2048300 C · Owner: Laboratoires Merck Sharp & Dohme-Chibret · Inventors: Rozier, Annouk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a fluid pharmaceutical composition intended to be brought into contact with a physiological fluid, characterized in that it contains, as active principle, at least one 4quinolone derivative complexed with a divalent metal ion selected from Cu++, Zn++ and Mg++, the said complex being in the form of particles of a size compatible with parenteral or ophthalmic administration in suspension in, a fluid dispersant and not being subject to a crystalline growth phenomenon during storage of the said composition; the invention also provides a process for preparing a pharmaceutical composition of this type.
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 1, 1991 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 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.