Patents by Inventor Fritz Ullrich

Fritz Ullrich 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).

  • Porous aggregate for light-weight concrete
    Patent number: 4095995
    Abstract: To prevent the escape of water into the porous aggregate of light-weight concrete at the time of pumping, the individual particles of the additive, which, with cement slurry, forms a gel-like protective layer, which is scarcely permeable to water, for a period of time, and which facilitates a bond between the aggregate and the cement. The protective layer can be produced by spraying a solution, in particular an aqueous solution of the additive into the aggregate particles, which are heated to a temperature above the boiling point of the solvent, and by evaporating the solvent.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: June 20, 1978
    Assignee: Chemotechnik Gesellschaft fur Baustoffchemie mbH & Co.
    Inventor: Fritz Ullrich
  • Dynamic shift register using insulated-gate field-effect transistors
    Patent number: 4084106
    Abstract: This dynamic two-phase clocked MOS shift register delivers the shifted signal in a non-inverted manner after half the clock pulse period and consists of six MOSFETs per stage.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: April 11, 1978
    Assignee: ITT Industries, Incorporated
    Inventor: Manfred Fritz Ullrich