Polymeric resins and blends with high packing densities
CA 1214615 A · Owner: Synergistics Chemicals Limited · Inventors: Crocker, Zenas; Wise, David V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powder blend of rigid polyvinyl chloride resin having higher packing densities than previously known is disclosed. The higher packing densities provide improved physical properties and production rates. There is also disclosed a process for the manufacture of particulate polymeric resin blends having high packing densities for processing into articles. The process includes mixing and thermokinetically heating a batch of particulate composition in a high intensity mixer having a plurality of blades attached to arms rotating about an axis with a blade tip speed of at least about 25 meters per second to effect blending of the composition and heating thereof to an elevated temperature below …
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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
- Granted December 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 2003.
- 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.