Apparatus
CA 2358004 A1 · Owner: Smiths Group Plc · Inventors: Wilson, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Known heat exchangers have two inlets and two outlets for two counterflow air paths, through a stack plates. In the present invention the plates are vacuum-formed each having a, section with zigzag walls forming multiple flow channels between adjacent plates. The edges, of the plates have walls that nest with one another and are retained and sealed between ribs, on two side plates. Four grilles at the inlets and outlets have bars with recesses retaining the, edges of pairs of plates the bars being separated by spaces allowing air to flow between, adjacent pairs of plates and into or out of the air paths.
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 September 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2023.
- 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.