Components and catalysts for the polymerization of olefins
CA 2015685 C · Owner: Govoni, Gabriele · Inventors: Ciarrocchi, Antonio; Govoni, Gabriele; Sacchetti, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Spherical catalyst components for the polymerization of olefins comprising a titanium compound and optionally an electron-donor supported on anhydrous magnesium chloride characterized by a surface area between 20 and 250 m2/g a, porosity between 0.25 and 0.5 cc/g, and an X-ray spectrum where the magnesium chloride reflections are present at 2 ~ of 35° and 14.95°, or where the reflection at 35° is substituted by a halo with the maximum intensity between 33.5° and 35° and the reflection of 2 ~ at 14.95° is absent.
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 April 27, 1990 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2012.
- 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.