Elastomeric copolymers of ethylene with propylene and process for their preparation
CA 2123336 A1 · Owner: Spherilene S.R.L. · Inventors: Resconi, Luigi; Galimberti, Maurizio; Albizzati, Enrico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Amorphous copolymers of ethylene with propylene and, optionally with minor amounts of polyenes have the following, characteristics:, (A) the % content by mole of propylene in the copolymer (%P) and the triads ratio EPE/(EPE+PPE+PPP) satisfy the following relationship:, 0.01%P + EPE/(EPE+PPE+PPP) ? 1 (B) less than 2% of the CH2 groups in the chain are in sequences (CH2)n, wherein n is an even number. These copolymers are obtainable by operating in the presence of particular metallocene catalysts having two fluorenyl groups joined together through a bridging group.
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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 May 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2016.
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Timeline
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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.