Multi-stage corona laminator
CA 1289446 C · Owner: W.R. Grace & Co. · Inventors: Schirmer, Henry George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-stage corona laminator may be used to produce a relatively thick, i.e. 10 mils or greater corona bonded lam-, inate characterized by low dielectric build-up and preferably, the presence of one or more oriented layers within the laminate material. The laminate is prepared by treating a first and second outer layer of a thermoplastic material on one surface thereof; corona treating at least one interior layer of a thermoplastic material on both surfaces thereof; and bringing the treated surfaces of the first and second outer layers and the, at least one interior layer, into respective contact with each other such that the untreated surfaces of the first and second outer layers form …
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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 September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
- 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.