Patents by Inventor Zoltan A. Juhasz

Zoltan A. Juhasz 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).

  • Process for the production of gypsum-based composite boards and shaped bodies
    Patent number: 6042665
    Abstract: Gypsum-based composite boards or shaped bodies can be manufactured from a mixture comprising calcium sulfate dihydrate and water, and optionally reinforcement materials or fillers, and conventional additives, by shaping the mixture to a raw form and hardening the raw form with water at a pressure exceeding the saturation pressure of calcium sulfate dihydrate.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: March 28, 2000
    Inventors: Bela Kiraly, Jozsef Hadnagy, Peter Szabo, Zoltan A. Juhasz
  • Process for preparing hydraulic binding materials of high bonding capacity from glassy pyrogenic rocks
    Patent number: 4188233
    Abstract: There is disclosed a process for preparing hydraulic binding materials having a high bonding capacity, starting from glassy pyrogenic rocks. According to the invention glassy pyrogenic rocks are mechanically activated by grinding. The activation time is 0.5 to 36 hours, preferably 4 to 12 hours, and the mechanical stress applied is higher than in case of the conventional fine grinding. The activated product is thereafter admixed with one or both of lime and cement.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: February 12, 1980
    Assignee: Budapesti Muszaki Egyetem
    Inventors: Zoltan Juhasz, Gyula Varju