Plate-type heat exchanger
CA 2049933 C · Owner: Hisaka Works Limited · Inventors: Nakamura, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plate-type heat exchanger comprises a plurality of plates laminated through gaskets fixed in gasket grooves formed in the entire peripheral edges thereof without using any adhesive agent. The plate-type heat exchanger is characterized in that the liquid-noncontacted peripheral side surface of the gasket body of the gasket is integrally formed with suitably spaced fixing tabs each comprising two or more projecting pieces projecting from the gasket body and a fixing piece extending parallel with the gasket body and connecting the projecting pieces. The plate is formed with gasket fixing portions associated with the fixing tabs of the gasket for fixing the fixing tabs by force-fitting the …
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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 18, 1991 and granted September 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2013.
- 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.