Portable temperature controlled floating electric immersion heater for a livestock water tank
CA 1309447 C · Owner: Hartman, Kenneth D. · Inventors: Owen, Donald B.; Hartman, Kenneth D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an electric water heater for heating livestock watering tanks which maintains the watering tank substantially ice free during low temperatures, thereby providing access to water by a plurality of animals. More particularly the present invention relates to an electric water heater having a housing supporting an electric heating element for immersion in water to be heated and to a device in the housing for monitoring and regulating operation of the heating element. The device in the housing comprises a temperature responsive switch, which is located in the housing out of contact with the water and a thermal conductor having both a first end affixed in a thermally …
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
- Granted October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
- 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.