Multi-tube type heat transfer apparatus
CA 2009624 C · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Nagai, Hideaki; Magari, Akira; Kobayashi, Kazuto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-tube type heat transfer apparatus including a plurality of heat transfer tubes disposed in parallel to each other within a shell wall is improved. A plurality of holes having a larger diameter than the outer diameter of the heat transfer tubes are provided in each of a plurality of baffle plates disposed at intervals within the shell wall. The heat transfer tubes extend through the respective holes. A flow passageway of fluid on the side of the shell is composed of annular spaces formed between the outer circumferences of the heat transfer tubes and the inner circumferences of the holes in the baffle plates. Preferably the inner diameters of the plurality of holes in the respective …
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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 8, 1990 and granted August 31, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2012.
- 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.