Blow molding method and machine for producing pasteurizable containers
CA 2389988 A1 · Owner: Boyd, Timothy J. · Inventors: Silvers, Kerry W.; Lisch, G. David Jr.; Boyd, Timothy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a biaxially oriented heat set plastic container, including the steps of providing a plastic preform within a mold cavity; expanding and stretching the plastic preform into conformity with the surfaces defining the mold cavity to form a biaxially oriented plastic container; inducing crystallinity in the plastic container by using convection heat transfer to heat a surface of the plastic container to a temperature of at least 120 ~C; and removing the plastic container from the mold cavity. The PET containers produced by the method have an average sidewall crystallinity greater than about 30 %, which allows the PET container to maintain is material integrity …
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 September 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2022.
- 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.