Metal sheet laminated with triple layered thermoplastic resin and a method for producing thereof
CA 2108728 C · Owner: Okamura, Takaaki · Inventors: Inui, Tsuneo; Okamura, Takaaki; Matsui, Kenzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A triple layered thermoplastic resin laminated metal sheet for a can stock having excellent flavour retention of packed foods and drinks, excellent formability, excellent adhesion of the thus laminated resin layer to a metal sheet and excellent denting resistance, particularly excellent denting resistance at a low temperature, which comprises formation of a triple layered thermoplastic resin layer wherein a polycarbonate resin layer is sandwiched between polyester resin outer and inner layers on one or both sides of a metal sheet covered with a single layer of hydrated chromium oxide or a double layer consisting of an upper layer of hydrated chromium oxide and a lower layer of metallic …
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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
- Filed October 19, 1993 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2015.
- 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.