Rubber compositions and method of making them
CA 2249193 A1 · Owner: Von Hellens, Carl Walter · Inventors: Von Hellens, Carl Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rubber compositions comprising an acrylate or methacrylate salt, an elastomer curable with a peroxide initiator and a plasticiser having one or more epoxide groups per molecule display lower compound Mooney viscosity higher, MH/modulus, increased hardness and improved odour.
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 October 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2020.
- 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.