Polymer recovery
CA 1206299 A · Owner: Polysar Limited · Inventors: Duffy, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure An improved process is provided for the recovery of a polymer from a solution thereof in an organic solvent by contact with steam and water wherein economics in the use of energy are achieved by controlling the contact of said solution with steam and water to provide a predetermined amount of residual solvent in the polymer said, contact being under conditions of controlled temperature and pressure. Such a process may be used for the recovery, for example, of polybutadiene from a solution in a benzene-butene-1 mixture.
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 June 17, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 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.