Biaxially drawn, blow-molded bottle and its preform
CA 2471581 C · Owner: Shimura, Hiromi · Inventors: Uesugi, Daisuke; Hashimoto, Akio; Suzuki, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention aims at solving problems caused by the incorporation of a gas barrier layer, that is, lowering in the dimensional accuracy of the mouth portion by thermal crystallization and delamination of the bottom independent , of the dislocation of a gas barrier layer occurring in the coinjection of a PET resin layer and the gas barrier layer. A biaxially oriented blow-molded bottle in which a gas barrier layer (3) is incorporated in a PET resin layer (2) by lamination and which is provided with a functional section (5) consisting of a screw (8) formed in the upper part of a mouth portion (4) and a stop ring (6) formed under the screw (8) and a neck ring (7) formed in the lowest …
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 January 29, 2003 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2025.
- 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.