Polymer additive concentrate
CA 1318073 C · Owner: Trotoir, Jean-Paul · Inventors: Trotoir, Jean-Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
S.34011, ABSTRACT, A polymer concentrate contains 15-80% by weight of a liquid pasty or waxy additive, 5-50% by weight of a particulate solid and at least 5% by weight of a polymer. The particulate solid is finely divided and typically has a particle size in the micrometre range. The concentrate is prepared by adding the additive to the particulate solid whilst mixing using a solids mixing device adding the polymer, whilst continuing to mix preferably at the same speed, subjecting the mixture to an elevated temperature to melt the polymer cooling, and grinding the cooled mixture.
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
- Granted May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- 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.