Multilayered hollow plastic article and method for obtaining same
CA 2172765 C · Owner: Husky Injection Molding Systems Ltd. · Inventors: Valyi, Emery I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a multilayered hollow plastic article having an inner first portion of thermoplastic material and an outer second portion of pressure molded thermoplastic material. The second portion of thermoplastic material extends from the closed bottom of the article to the open neck of the article and the first, portion of thermoplastic material extends from the closed bottom to below the neck region of the article. The present invention also relates to the method for preparing said article.
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 March 27, 1996 and granted December 8, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.