Improved transportating ring
CA 2088535 C · Owner: Williams, John Paul · Inventors: Jack, Robert Crawford; Williams, John Paul; Mccallum, Duncan John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A unitary, removable, transportation ring for retaining the lid or cover on a cylindrical container such as a metal paint can, which operatively fits over the outer margin of the container's friction-fit cover and upper rim flange; such ring being molded of rigid plastic material to form a unitary annular member of generally inverted U-shape cross section defining an annular body having a raised planar platform forming a stacking ring on the upper side of its body and two parallel annular limbs depending from the underside of the body; the radially outer annular limb having a continuous radially inwardly projecting locking bead or finger adapted to underengage the upper rim flange of the …
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 February 1, 1993 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2015.
- 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.