Patents by Inventor Valery Y. Rotan

Valery Y. Rotan 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).

  • Method of disposing of a washing water sludge from filtering systems
    Patent number: 4304674
    Abstract: A washing water sludge from filtering systems, obtained through settling thereof, is disposed of by being introduced into a concrete mix as the mixing water for the preparation of concrete.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: December 8, 1981
    Inventors: Yakov B. Lazovsky, Mark G. Novikov, Andrei I. Kostrits, Valery Y. Rotan, Vladimir F. Sheryakov