Method for continuously preparing thermo-crosslinkable and/or thermoplastic elastomer blends
CA 2080985 A1 · Owner: Gezolan Ag · Inventors: Unger, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing thermo-crosslinkable and/or thermoplastic elastomer blends by mixing the elastomer with plasticizer oil and other additives, said method comprising the steps of:, (a) continuously premixing the crushed elastomer in an annular zone mixer with at least part of said plasticizer oil and, optionally with at least part of said other additives to, form a preblend in which said elastomer is decomposed and said additives are embedded in the polymer matrix and thereafter, (b) completing the mixing of said premix and optionally of the, remainder of said additives in a mixing unit working, batchwise or continuously.
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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 October 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2014.
- 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.