Metallized oriented polypropylene films
CA 1308014 C · Owner: Keller, Lajos Edward · Inventors: Keller, Lajos Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oriented polypropylene film structure comprises an oriented polypropylene base layer and a layer of a vinylidene chloride polymer on at least one surface of the base layer or on an intermediate layer the, vinylidene chloride polymer layer being substantially free of migratable emulsifier. A metal layer is provided directly on the vinylidene chloride polymer layer.
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 September 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 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.