Patents by Inventor Vitaly I. Zlobin

Vitaly I. Zlobin 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 of manufacturing gypsum products
    Patent number: 4213931
    Abstract: In manufacturing gypsum products, crushed natural dihydrous gypsum CaSO.sub.4.2H.sub.2 O is molded and heat-treated in air at temperatures ranging from 100.degree. to 200.degree. C. The temperature is raised to a required level at a rate of 2 to 3 degrees per minute. The products are strengthened by watering.The end gypsum products feature a water absorption of 7 to 10% and a frost resistance of 40 to 50 cycles. Their compression strength is 170 to 300 kg/cm.sup.2.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: July 22, 1980
    Inventors: Viktor A. Trutnev, Vitaly I. Zlobin, Valentin K. Kushnarenko, Valentin B. Ignatov, Boris V. Gannota, Nikolai S. Ambartsumyan, Boris B. Volovik