Portable ice rink building and resurfacing device
CA 2522539 C · Owner: Donaldson, Steven M. · Inventors: Donaldson, Steven M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ice rink surface building and resurfacing device has a water tank (175) mounted on a chassis (100), wherein the water tank is adapted to receive snow to be melted; a heating mechanism (107) mounted in heat exchange relation to the water tank; and a fluid disperser (290) connected to the tank for distributing a layer of water onto an ice rink surface. This device is well suited for ice rinks with various forms of ice surfaces in residential areas in backyards, on remote terrain, and in community parks.
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 April 16, 2004 and granted October 23, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2026.
- 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.