In-line polymer melt rheometer
CA 2045707 A1 · Owner: Tadros, Safwat E. · Inventors: Tadros, Safwat E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and a process for quickly and accurately determining in-line the rheology of molten polymer streams, said apparatus comprising a cam means and a pressure wall means, one of which is a rotating member and the other one is a stationary member the, rotating member dragging molten polymer into a wedge-shaped clearance between the cam means and the pressure wall means, polymer pressure within the clearance being sensed by a pressure detection device capable of producing a signal responsive to said pressure in the form of a display, a graph or an, arbitrary numerical value, but preferably being transmited to a computer programmed to calculate apparent melt viscosity of the polymer by …
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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 June 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 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.