Aluminum heat-exchanger core
CA 1286656 C · Owner: Fujiyoshi, Tatsuya · Inventors: Fujiyoshi, Tatsuya; Hashimoto, Katsuyuki; Wada, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aluminum heat-exchanger core comprised of tubes joined, by a furnace brazing operation using non-corrosive flux, with cooling fins of which surfaces are covered with a brazing material for furnace brazing. Both or either one of the core material of the cooling fins and the brazing material for furnace brazing contains 0.5-2% of Zn and Zn layer previously provided by plating over the outer surfaces of the tubes to form a Zn diffusion layer by the heating effect during furnace-brazing.
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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.