Composition based on calcium of magnesium acetylacetonate and free or chelated .beta.-diketones, preparation and use
CA 2292740 C · Owner: Henrio, Francoise · Inventors: Henrio, Francoise; Gay, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a composition comprising calcium or magnesium acetylacetonate and at least a free .beta.-diketone and/or in the form of a metal chelate and having a melting point at most equal to 200 ·C. The invention also concerns the use of said composition for forming a formulation comprising at least a halogenated polymer to prevent heterogeneity resulting from the presence of calcium or magnesium acetylacetonate in said polymer.
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 4, 1998 and granted August 12, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2020.
- 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.