Process for the manufacture of a filament reinforced extruded rubber body
CA 2010191 C · Owner: Carl Freudenberg · Inventors: Hempel, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of a filament reinforced extruded rubber body using a shear head, includes the steps of continuously feeding the filaments through a shear mandrel into a continuously advancing rubber composition for embedding the filaments into the rubber composition and vulcanizing the rubber mixture to fix the filaments within the rubber body. The filaments continuously exit from mouths on the front end of the shear mandrel which continuously rotates within the shear head and are embedded into that volume of the rubber mixture which is in the shear head. The speed of advance of the rubber composition is matched to the rotation speed of the shear mandrel in such a way that the …
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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
- Filed February 15, 1990 and granted May 24, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.