Process of producing a rubber-extruded article
CA 2044532 C · Owner: Iwasa, Tadanobu · Inventors: Iwasa, Tadanobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a rubber extruded article comprising a main body made of EPDM by, finishing the surface of the article with a cloth-like surface, by attaching cloth to a designated surface of the rubber substrate, said process comprising forming the main body of an extruded article by extrusion while forming a first adhesive layer comprising a blended rubber composed of 40 to 80% by weight of NBR, 20 to 60% by weight of EPDM and 0 to 35% by weight of SBR, or a composition of the blended rubber on the designated surface of the rubber substrate subjecting the main body of the extruded article to a vulcanization step, and, then pressure-bonding a long narrow strip of, cloth lined with …
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 June 13, 1991 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2013.
- 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.