Oil-resistant sheet material
CA 2531498 C · Owner: Akiyama, Kousuke · Inventors: Akiyama, Kousuke; Asai, Yasuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil-resistant sheet material having low resistance to air permeability and excellent oil resistance and particularly suitable for use as a packaging material for food containing edible oil. The oil-resistant sheet material is obtained by forming at least one coating layer containing a hydrophobized starch and a crosslinking agent on at least one side of a substrate in an amount of 0.5 to 20 g/m2. When the coating layer further contains fatty acid and/or polyvinyl alcohol, oil resistance is improved. A coating layer containing fatty acid as a main component or a coating layer containing polyvinyl alcohol as amain component may be applied onto the above-described coating layer to …
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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 10, 2004 and granted September 3, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2026.
- 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.