Apparatus for heating fluids
CA 2115383 C · Owner: Hydro Dynamics, Inc. · Inventors: Griggs, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for the heating of fluids by, causing severe turbulence of the fluid within a cavity of a housing. The device utilizes a rotor closely received within a cavity the, rotor mounted upon a rotatable shaft with the, surface of the rotor provided with a plurality of uniformly-spaced recesses oriented at a selected angle to the surface. The shaft is journalled in bearing assemblies and seal units at end walls of the housing, and the shaft is rotated by any suitable motive means. The heated fluid then is stored in any suitable storage facility, or utilized for any desired purpose. The system is specifically described for the purpose of heating water. This heated water is for standard use …
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 February 10, 1994 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 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.