Sheet material
CA 1294864 C · Owner: Japan Gore-Tex, Inc. · Inventors: Nomi, Haruo; Hatakeyama, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite sheet material is provided comprising a porous expanded, polytetrafluoroethylene base sheet impregnated with a first resin that has a lower heat-shrinkability than the base sheet the impregnated base sheet, having a covering layer which has a thickness of at least three (3) micrometers and which comprises a second resin whose hardening rate is lower than that of the impregnating resin. The present invention is useful in printed circuit boards wherein prepregs according to the invention are laminated with a metal sheet, a resin sheet. or another printed circuit board.
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 January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.