Coextrudable adhesive for polystyrene, and products therefrom
CA 1340399 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Lee, I-Hwa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blend of ethylene vinyl acetate copolymer ethylene vinyl acetate copolymer modified by grafting with a comonomer containing pendant acid or acid derivative functionality, and impact-modified polystyrene provides a useful adhesive particularly, for bonding polystyrene to gas barrier polymers.
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 February 16, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2016.
- 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.