Fillers and pigments possessing organic polymer stabilizing properties and a process for their preparation
CA 1309307 C · Owner: Bersellini, Ugo · Inventors: Zavattini, Omero; Gussoni, Damiano; Costanzi, Silvestro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PROCESS FOR THEIR PREPARATION". ABSTRACT Stabilizing inorganic fillers or pigments having simultaneous reinforcing effect and stabilizing effect on organic polymers are obtained by a process comprising the following stages: a) bringing the inorganic filler or pigment into contact with a, solution, in an inert organic solvent of a sterically hindered, amine comprising one or more alkoxysilane groups in its molecule; b) maintaining the obtained mixture at higher than ambient temperature (20-25°C) for a period of at least 0.5 hours; c) removing the solvent, treating at a temperature of 120-200°C and recovering the stabilizing filler or pigment obtained.
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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
- Granted October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
- 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.