Fiber reinforced multi-ply stampable thermoplastic sheet
CA 1137724 A · Owner: Allied Corporation · Inventors: Steinberg, Albert H.; Mackey, Joseph E.; Dellavecchia, Michael P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Reinforced thermoplastic polymer composite sheets formable into smooth, shaped objects in a stamping process. The composite sheet is produced by laminating together (1) a first layer of thermoplastic resin containing short glass fibers and a mineral filler such as kaolin (2) a backing, reinforcing layer comprising a long glass mat impregnated by thermoplastic resin and (3) optionally a third layer similar to said first layer. The long glass mat is positioned within the reinforcing layer during impregnation whereby the mat, becomes encased in a resin matrix.
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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.