Curling hack
CA 2023342 C · Owner: Thompson, Albert N. · Inventors: Thompson, Albert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A curling hack has a Base made of a fire retardant plastic material and a replaceable grip pad with ends fixed to the top of the base. A mating groove and rib arrangement on the base and pad provide a resilient, cushioning effect. The grip pad is a soft high friction material. The back of the hack is supported on the floor by adjustable height columns. The top surface of the hack is configured without a notch between the horizontal front surface and the upwardly sloping back surface.
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 August 15, 1990 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2012.
- 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.