Plate, foam and screen filament quenching apparatus
CA 1253664 A · Owner: Invista Technologies S.A.R.L. · Inventors: Valteris, Ramunas L.; Caldwell, Gary L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for quenching synthetic filaments which comprises an elongated chimney a, porous open-celled foam sheet, dividing said chimney longitudinally into a plenum chamber and a quenching chamber through which filaments pas in a path from an extrusion device to a means for collecting filaments and a means to supply a flow of gas to the plenum chamber. The improvement comprises a mesh screen coextensive with the foam sheet positioned between the foam sheet and the quenching chamber. RD-4050
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 May 9, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 9, 2006.
- 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.