Patents by Inventor Lev Y. Zlatkevich

Lev Y. Zlatkevich 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).

  • Heat insulating ablative-type materials
    Patent number: 5082877
    Abstract: An ablative-type protective material is provided comprising:(a) a polymeric compound comprising a plurality of at least a first repeat unit having the form ##STR1## wherein the first repeat unit is present in an amount ranging from about 70 to about 100 mole percent, inclusive and(b) an aluminum sulfate hydrate of the general formulaAl.sub.2 (SO.sub.4).sub.3.nH.sub.2 Owherein n is an integer from 14 through 18, inclusive and wherein the aluminum sulfate hydrate is present in an amount greater than about 50% by weight of the ablative-type protective material.The resulting composition exhibits an improved resistance to oxidative degeneration as well as improved heat and flame protection times.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: January 21, 1992
    Assignee: Ad-Va-Cote Tri-State Inc.
    Inventors: Vitaly Raevsky, Lev Y. Zlatkevich, Robert D. Brown