Interpenetrating polymer network as coating for metal substrate and method therefor
CA 2617868 C · Owner: 3M Innovative Properties Company · Inventors: Attaguile, Salvatore M.; Wood, Thomas L.; Perez, Mario A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coated article and method therefor comprises a metal substrate comprising a layered coating composition on at least one surface thereof the coating composition comprising a layer of epoxy on one or more of the surfaces of the substrate. The coating composition further comprises an overcoat layer comprising a combination of polyolefin and epoxy resins the overcoat layer optionally being free of added epoxy curative. The article can be a pipe vessel, conduit, rod, profile-shaped article or tube. A preferred overcoat layer comprises a semi- or full- epoxy/polyolefin interpenetrating polymer network (IPN). In another embodiment the coated article comprises a polyolefin/epoxy layer that is …
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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 August 11, 2006 and granted October 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.