Conductive filaments containing polystyrene and process for producing anti-static yarns
CA 1324713 C · Owner: Lin, Perry Han-Cheng · Inventors: Lin, Perry Han-Cheng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improvement in a process for producing anti-static yarns by the steps of combining at least one spin-oriented, conductive filament having a nonconductive polymeric component coextensive with a component of electrically conductive carbon dispersed in a polymeric matrix with freshly spun undrawn, nonconductive filaments, drawing and cobulking the combined filaments to form a yarn. The improvement is for reducing the tendency of the conductive filaments to break during drawing wherein the nonconductive polymeric component of the spin-oriented, conductive filaments is a melt-blend containing a major amount of a nonconductive fiber-forming polymeric material and a minor amount of a …
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 November 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 2010.
- 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.