Process and apparatus for removing volatile constituents from polymer melts or pastes
CA 1233288 A · Owner: Basf Aktiengesellschaft · Inventors: Floss, Josef G.; Pipper, Gunter; Riegger, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for removing volatile constituents from a polymer melt in a vented extrude, which comprises: passing the polymer melt containing the volatile constituents through one or more zones, with continuous formation of fresh surfaces evaporating volatile constituents from this polymer melt in one or more such zones, and removing the vapors of volatile constituents, thus produced, from the zone or zones via a porous plate having a porosity of from 25 to 60% and a pore diameter of from 5 to 200 µm. And an apparatus to carry out this process.
Read the whole patent
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 February 23, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2005.
- 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.