Process for preparing polymer fibres
CA 1049727 A · Owner: Stamicarbon B.V. · Inventors: Van Den Berg, Cornelis E. P. V.; Vroomans, Hubertus J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymer fibres are made from a solution of polymer in solvent by subjecting the solution to shear forces in a confining space by introducing a gas stream into the space in a manner to create a rotary gas flow therein and to cool the solution to a temperature at which polymer precipitates from the solution in the form of fibres. - 1 -
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 March 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 1996.
- 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.