Process and composition for manufacturing friable rubber bales
CA 2029486 C · Owner: Widmer, Lincoln A. · Inventors: Widmer, Lincoln A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a composition for coating wet rubber particles during extrusion and pelletization prior to drying comprising an inorganic partitioning agent a, thickener and binder reagent, water and a water soluble anionic dispersant, and to the process for application to elastomers including those of low viscosity or high resin content to improve their processability during manufacture.
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 7, 1990 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 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.