Patents by Inventor Walter Boberg

Walter Boberg 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).

  • Apparatus for making insulating cellular concrete
    Patent number: 5232279
    Abstract: An apparatus for making insulating cellular concrete consists of one or multiple mixing tanks. The multiple tanks are connected in tandom to a common pressure fed pump (6) via a valved (8) manifold (10). These simplified apparati can be trailer mounted (12), allowing for easy transport. A special blade assembly (14), water heating device (16), and check valve (20) allow for versatility, improved quality of concrete, and economy.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: August 3, 1993
    Inventors: Walter Boberg, M. Kathleen Boberg