Compact gas fired water heater with improved combustion chamber
CA 2269106 A1 · Owner: Bridegum, James E. · Inventors: Bridegum, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact gas fired water heater is provided for recreational vehicles and other side wall installations wherein, the water heater is designed to have minimum width and height dimensions and at the same time have more internal heating surface for greater recovery and higher efficiency than water heaters of similar dimensions. The combustion chamber is comprised of two straight horizontal lengths of tube joined in the rear by a specially formed coupler which enables the bottom inlet and the top outlet of the tube to make a smaller radius turn than that permitted with a bent tube type combustion chamber.
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 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
- 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.