Patents by Inventor Robert J. Urban

Robert J. Urban 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).

  • Polyether antibiotic recovery and purification
    Patent number: 5041374
    Abstract: Polyether antibiotic material is liberated from agglomerates containing a lipid material and the polyether antibiotic material by separating the polyether antibiotic from the lipid through formation of an acid salt of the lipid and a desired acid salt of the polyether antibiotic. The agglomerates can be formed during fermentation or produced by adding lipids afterwards.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: August 20, 1991
    Assignee: International Minerals & Chemical Corp.
    Inventors: Alexander H. T. Chu, Robert J. Urban
  • Method of decolorizing wet process phosphoric acid
    Patent number: 4643883
    Abstract: A method of decolorizing wet process phosphoric acid containing organic color-imparting impurities is provided. The process includes treating the acid with a strong oxidant at a temperature in the range of about 50.degree. to about 150.degree. C. by slowly adding the oxidant to the acid over a period of time of at least about 3 hours. The oxidized acid then is contacted with a regenerable activated carbon, preferably in a packed column, in order to adsorb the oxidized color-imparting impurities.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: February 17, 1987
    Assignee: International Minerals & Chemical Corp.
    Inventors: Earl E. Borchert, Robert J. Urban, Ray E. Barker