Patents by Inventor Metelkin A. Ivanovich, deceased

Metelkin A. Ivanovich, deceased 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).

  • Leather tanning agent and process for making same
    Patent number: 4504271
    Abstract: A leather tanning agent characterized in that it contains the following components, percent by weight:______________________________________ sulphate of aluminum and ammonium 3 to 20 containing 0.001 to 1.0% of TiO.sub.2 or TiO.sub.2 and ZrO.sub.2 and/or sulphate of zirconium and ammonium 20 to 50 containing 0.001 to 0.5% of TiO.sub.2 or TiO.sub.2 and Al.sub.2 O.sub.3 and sulphate of titanyl and ammonium containing of 0.001 to 1.0% of Al.sub.2 O.sub.3 and/or ZrO.sub.2 the balance. ______________________________________The above-mentioned additives of TiO.sub.2, ZrO.sub.2 and Al.sub.2 O.sub.3 incorporated in the sulphates are present therein in a chemically combined state.
    Type: Grant
    Filed: January 18, 1983
    Date of Patent: March 12, 1985
    Inventors: David L. Motov, Ljudmila P. Tjurkina, Maria M. Godneva, Nina I. Kolesnikova, Galina G. Yakusheva, Metelkin A. Ivanovich, deceased, by Chibisova N. Fedorovna, administrator