Blow molded container and blow mold thereof
CA 2187915 C · Owner: Sato, Jyoji · Inventors: Hisama, Hiroyuki; Seguchi, Masato; Sako, Isamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blow molded container of the present invention is a container formed by blow molding in which a single-layer or multi-layer parison comprising a cylindrical resin material is heated and inflated by air in a mold wherein a bottom, sealing portion formed by pinch offs of the mold has a projection projecting outwardly from the container and sunk portions formed in one of the resin layersconstituting the projection such a manner as to be buried in the other resin layer. Therefore the bonded area between the resin layers is widened thereby having, higher bond strength and higher strength against the shearing force along the fusion bonded area
Read the whole patent
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 2, 1996 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2018.
- 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.