Heat exchanger fin with efficient material utilization
CA 2238282 C · Owner: Obosu, Charles B. · Inventors: Obosu, Charles B.; Lim, Alexander T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat exchanger (10) including a heat exchanger conduit and fins arranged on the conduit tubes (12, 12') to further heat transfer between the external fluid flowing over the fins (22, 22') and the fluid flowing within the conduit. The fins (22, 22') include a row of apertures through which tubes (12, 12') of the heat exchanger conduit extend. The leading (46) and trailing edges (48) of the fins (22, 22') are contoured to substantially conform to isotherms around the circulating fluid flowing within the tubes (12 12'). To , achieve this edge configuration while also allowing for a dense packing of fins and tubes in a multi-row heat exchanger the leading and trailing edges , are wave …
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 August 19, 1996 and granted April 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2018.
- 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.