Container stopper and manufacturing method therefor
CA 2555368 C · Owner: Suntory Holdings Limited · Inventors: Okamoto, Masaru; Kishi, Shigenobu; Fujimoto, Katsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A container stopper includes a core 1 formed of an elastic material and having a liquid-contact surface F1 and an outer peripheral surface F2 continuous with the liquid-contact surface coated with a skin made of a synthetic resin. The skin 2 is a skin made of a polyester resin or a synthetic resin having a polyester resin as a main component thereof, and the polyester skin 2 is bonded to the liquid-contact surface F1 and the outer peripheral surface F2 of said core through a bonding layer 3 formed of a polyethylene resin or having a polyethylene resin as a main component thereof. The polyethylene bonding layer 3 has a thickness of 80 to 300 µm at a center portion of the …
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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 February 8, 2005 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2025.
- 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.