Drying polymer solutions
CA 1111183 A · Owner: Phillips Petroleum Company · Inventors: King, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The drying of a polymer solution by the removal of solvent is accomplished by flashing the polymer solution while spraying into a bed of substantially dry polymer particles. The dryer polymer particles coat the partially dried solution polymer droplets and the remaining solvent is, removed by the energy produced from the mechanical agitation of the bed and the passing of heated inert gas through the polymer bed.
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 October 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
- 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.