Patents by Inventor Peter H. Schubert

Peter H. Schubert 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).

  • Method of producing sand-lime bricks with a low bulk density
    Patent number: 4229393
    Abstract: A method for producing sand-lime bricks of low bulk density and having a green strength of at least 1 kp/cm.sup.2 in which at least 1% by weight of cement is added to a mixture of sand, lime and water and the mixture is then compacted in molds by vibration or under a pressure of less than 150 kp/cm.sup.2 to form bricks which are subsequently cured.
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: October 21, 1980
    Inventors: Karlhans Wesche, Peter H. Schubert, Horst W. Glitza