Gas-barrier coated films, sheets or foils and method of preparation
CA 1071035 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Ikeda, Richard M.; Angelo, Rudolph J.; Samuels, Michael R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CANADIAN SERIAL NO> 243 64g, E.I. du Pont de Nemours and Compary (Angelo, R.J. Blomberg, R,N. Boettcher F.P. Ike,da, R.M. & Sauela, M,R. ), ABSTRACT OF THE DISCLOSURE Films, sheets or foils are given a gas-barrier coating of an aromatic polyamide, polyimide polyamide-imide, polyhydrazide, polyamide-hydrazide or polyazomethine by, direct vapor-phase condensation polymerization of their respective monomers. The monomers are introduced in an inert diluent gas, mixed and reacted in the presence of the surface to be coated. The surface is maintained above the critical minimum deposition temperature of the monomers but below about 300°C. The coating is formed to a thickness between about 0.1 and …
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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 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 1997.
- 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
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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.