A process for making a thermoplastic molding composition
CA 2421733 A1 · Owner: Bayer Materialscience Llc · Inventors: Kozlowski, Henry A.
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 thermoplastic molding composition is disclosed. The process entails introducing a solid polymeric resin optionally containing , residual moisture into an extruder, operating under conditions designed to melt the resin and charging water into the melt while in the extruder to yield wet, molten resin that contains water in an amount of at least about 2 percent. The wet, molten resin is then devolatilized to yield dry resin having water content not exceeding 0.3 percent. Molding compositions thus produced have improved properties. In a preferred embodiment the process results in a , molding composition that contains a fine dispersion of a discontinuous phase in …
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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 September 5, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2023.
- 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
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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.