Self-enclosing heat exchangers
CA 2260890 A1 · Owner: Lemczyk, Thomas F. · Inventors: Lemczyk, Thomas F.; Evans, Bruce Laurance; So, Allan K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Self enclosing heat exchangers are disclosed which are made from stacked plates having raised peripheral flanges on one side of the plates and continuous peripheral ridges on the other side of the plates so that when the, plates are put together fully enclosed alternating flow channels are provided between the plates. The plates have raised bosses defining flow ports that line-up, in the stacked plates to form manifolds for the flow of heat exchange fluids through alternate plates. Rib and groove barriers are formed in the plates inside, the peripheral flanges and ridges. The barriers prevent short circuit flow on one, side of the plates and promote flow to remote areas on the other side …
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 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.