Method of making heat exchanger and hollow shape for such
CA 1313752 C · Owner: Norsk Hydro A.S · Inventors: Knoll, Richard, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of making a motor vehicle radiator in which extruded hollow shapes of oval cross-section provided inwardly with at least one longitudinally extending web lying transversely of the larger major axis of the oval cross-section, are reshaped, e.g. rolled under pressure to a cross-sectional form of a flat profile tube having two parallel sides, soldered to cooling fins and fitted into a radiator housing. The extruded hollow shape of light metal with a substantial oval cross-section for use in this method comprising inwardly at least one web which extends in the longitudinal direction of the shape and transversely to the large major axis of the oval cross-section of the shape.
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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
- Granted February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2010.
- 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.