Patents by Inventor Stieg Andersson

Stieg Andersson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pressure containing heat transfer tube and method of making thereof
    Publication number: 20050067156
    Abstract: A heat transfer tube and a method of forming a heat transfer tube with indents formed in the opposed walls. The indents may be cold welded or forge welded such that dimples or indentations meet in the middle of the tube. The bottom of a first indentation disposed on a first side of the tube is welded to the bottom of a second indentation formed in the opposite side of the tube.
    Type: Application
    Filed: July 15, 2004
    Publication date: March 31, 2005
    Inventors: Edward Rottmann, Donald Bennett, Timothy Goebel, Stieg Andersson, Liangyou Tang