Water heater with heat trap for dip tube
CA 2016295 C · Owner: Threatt, Gary S. · Inventors: Threatt, Gary S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hot water heater (12) has a modified dip tube (70) with a heat trap (80, 78, 82 74) therein. The cold water inlet pipe (90) is threaded directly into a spud (26) on the tank without an extra fitting (32) otherwise required for a heat trap the heat trap, function being performed in the dip tube (70) and eliminating the cost of a separate external heat trap fitting otherwise required for such function. The travel stroke of the heat trap sealing ball (80) is located entirely within the storage tank (14) to reduce noise caused by movement of the ball (80).
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 8, 1990 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.