Finned tube
CA 2114853 C · Owner: Rosink Apparate- Und Anlagenbau Gmbh · Inventors: Brundermann, Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a finned tube (1) a process for making it and a device for implementing the process. In the process at least one endless strip (4) forming the fins is wound approximately helically about a rotating tube body (2) and the narrow edge of the strip (4) facing the tube body (2) is secured to the tube surface by a welding device (7). In order to be able to operate economically and to save energy and provide a product in which the fin is secured to the tube surface over the entire width of its foot in the best possible way and the joint region is a good heat conductor the working end of the welding device (7) is guided in the free wedge between the tube surface (3) and the …
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 July 17, 1992 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2014.
- 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.