Polymeric filaments by tensioning and treatment with heated gaseous fluid
CA 1098272 A · Owner: Imperial Chemical Industries Limited · Inventors: Barker, Ivan; Marshall, Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for forming polymeric filamentary material in which extruded molten filaments are advanced through a solidification zone over non-rotatable guide means for tensioning the solidified filaments without inducing substantial drawing thereof through a gaseous fluid, heated to a temperature above the glass rubber transition temperature of the filaments and then wound up at a velocity of from 1000 metres/minute.
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 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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.