Patents by Inventor Sandor Silye

Sandor Silye 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 preparing N-phosphonomethyl-glycine
    Patent number: 4983764
    Abstract: The invention relates to an improvement of a process for preparing N-phosphonomethyl-glycine by oxydation of N-phosphonomethyl-imino-diacetic acid in an aqueous sulphuric acidic medium with hydrogen peroxide.A characteristic feature is using a waste acid liquor as reaction medium formed as aqueous sulphuric acid and obtained after the separation of N-phosphonomethyl-glycine when carrying out oxydation. This solution is optionally diluted with water until a concentration of 12-18 weight % of sulphuric acid and 3-5 weight % of N-phosphonomethyl-glycine.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: January 8, 1991
    Assignee: Nitrokemia Ipartelepek
    Inventors: Jeno Pelyva, Laszlo Lendvai, Sandor Balint, Zoltan Kolonics, Csaba Soptei, Sandor Laszlo, Bela Karacsonyi, Janosne Benczik, Csaba Kayos, Sandor Silye