Method and apparatus for prechilling tap water in ice machines
CA 2120110 C · Owner: Welch, Daniel Lee · Inventors: Love, Jeff Linden; Welch, Daniel Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and apparatus for prechilling tap water by using a heat exchanger to provide a path of flow for the warm tap water fed into an ice maker machine and another path for the cold waste water ejected by the machine by means of which heat can be transferred through walls separating the fluids. The prechilling is achieved by using an insulated, elongated casing having top and bottom ends forming there between a closed reservoir housing the heat exchanger made of copper tubing or the like. The heat exchanger is in the form of a coil followed by a substantially straight tube within and surrounded by the coil's turns. A heat-insulating hollow member, which is closed at one end is spaced, …
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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 28, 1994 and granted June 16, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2016.
- 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.