Injection blow-molded disposable tumbler and method of making same
CA 2348832 A1 · Owner: Mccarthy, Donald C. · Inventors: Freek, Michael A.; Thomas, Michael G.; Sandstrom, Erland R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An injection blow-molded disposable tumbler is formed from a polymeric material and includes a fortified upper rim having a thickness greater than the, adjacent sidewall. The tumbler may be formed of a variety of resinous materials and, exhibits improved toughness and crush resistance as well as aesthetic qualities, particularly desired by consumers. In a particularly preferred embodiment thick-, walled polycarbonate tumblers are prepared from hydrolysis-stabilized polycarbonate, compositions while minimizing molded-in stress. In still further embodiments nanocomposites compositions are used to form the containers of the invention.
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 May 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2023.
- 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.