Thermally insulated synthetic resin container and thermally insulated synthetic resin lid
CA 2199237 C · Owner: Yamada, Masashi · Inventors: Fujii, Takafumi; Tanaka, Atsuhiko; Yamada, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double-walled synthetic resin container wherein a gap between an inner container and an outer container holds a synthetic resin thermal insulator layer having a double-walled structure and filled with a low thermal conductivity gas having a thermal conductivity lower than that of air. Additionally a, double-walled synthetic resin lid wherein a gap between a top surface wall and a bottom surface wall holds a synthetic resin lid thermal insulator layer having a double-walled structure and filled with a low thermal conductivity gas having a thermal conductivity lower than that of air. A plating film does not need to be formed, thus reducing the manufacturing costs increasing the freedom of …
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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 March 5, 1997 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2019.
- 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.