Patents by Inventor Einar Langset

Einar Langset 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).

  • Hole in the ground for transfer of geothermal energy to an energy-carrying liquid and a method for production of the hole
    Patent number: 6000471
    Abstract: A hole in the earth for transferring geothermal energy from the earth around the hole to an energy carrier fluid which is introduced into the hole. The lower ends (7, 8) of at least two substantially vertically extending hole sections (2, 4) which have been used as wells for the recovery of oil or gas, are interconnected via an additional hole section (3).
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: December 14, 1999
    Inventor: Einar Langset