Heat-exchanger for arrangement behind the combustion chamber of a heating boiler
CA 2099095 A1 · Owner: Viesmann, Hans · Inventors: Viesmann, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a heat exchanger for arrangement behind the combustion chamber of a heating boiler. The heat exchanger comprises water-carrying and gas-carrying interior chambers separated from one another by walls extending in parallel and being helically coiled about a filling member and sealed against one another by cranked edges. In order to so form a preferred form of embodiment of a heat-exchanger of this type that the participating components, considering the coiling process can be dimensioned thin and nevertheless insure a pressurestable final condition, thereby foregoing separate spacers actually not forming part of the heat-exchanger and thereby preventing or …
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 June 23, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2015.
- 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.