Polyethylene terephthalate molding resin blends
CA 2002049 A1 · Owner: Wilder, Charles R. · Inventors: Wilder, Charles R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Glass fiber reinforced polyethylene terephthalate molding resin blends are provided which crystallize rapidly after being injection molded and which have engineering resin performance characteristics. In addition to polyethylene terephthalate and glass fibers, the blends contain an aliphatic polyester an ionic, hydrocarbon polymer, an antioxidant and, optionally,polythylene, and/or a polymeric epoxy compound. The blends can be flame retarded with a brominated polystyrene and an antimonate without substantial loss of, or change in, properties.
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
- Filed November 2, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2011.
- 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.