Spherical pearlescent pigment concentrate comprising a wax and a surfactant
CA 2545789 C · Owner: Engelhard Corporation · Inventors: Becker, Doreen C.; Venturini, Michael T.; Kazi, Shahjahan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a substantially spherical composition comprising about 60 to 80 percent by weight pearlescent pigment 14 to about , 38 percent by weight wax and about 2 percent to 6 percent surfactant. This composition is particularly useful for extrusion into any polymer used for masterbatching. The masterbatch is then typically blow or injection molded or extruded into a finished part.
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 November 24, 2004 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.