Patents by Inventor Dominic A. Dragotta

Dominic A. Dragotta 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 for the use of polyhydroxyalkanoate levels to maintain bioreactor health
    Patent number: 6991931
    Abstract: A method has been developed to maintain the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced as an indicator of bioreactor health and regulating the concentration of feed nutrients and nitrate to maintain bioreactor health. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: January 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Polyhydroxyalkanoate levels as an indicator of bioreactor health
    Publication number: 20040152151
    Abstract: A method has been developed to monitor the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced and correlating those levels with various selected sample parameters. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Polyhydroxyalkanoate levels as an indicator of bioreactor health
    Patent number: 6737263
    Abstract: A method has been developed to monitor the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced and correlating those levels with various selected sample parameters. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: May 18, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Polyhydroxyalkanoate levels as an indicator of bioreactor health
    Publication number: 20020052016
    Abstract: A method has been developed to monitor the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced and correlating those levels with various selected sample parameters. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Application
    Filed: August 28, 2001
    Publication date: May 2, 2002
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas