Patents by Inventor Thomas Miller Harris

Thomas Miller Harris 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).

  • Diesel exhaust fluid formulation that reduces urea deposits in exhaust systems
    Patent number: 8999277
    Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, acetaldehyde, propianaldehyde, or butyraldehyde, and this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: April 7, 2015
    Assignee: Deere & Company
    Inventors: Ponnaiyan Ayyappan, Danan Dou, Thomas Miller Harris
  • Diesel exhaust fluid formulation that reduces urea deposits in exhaust systems
    Patent number: 8961818
    Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: February 24, 2015
    Assignee: Deere & Company
    Inventors: Ponnaiyan Ayyappan, Danan Dou, Thomas Miller Harris
  • DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS
    Publication number: 20140369910
    Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Inventors: Ponnaiyan Ayyappan, Danan Dou, Thomas Miller Harris
  • DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS
    Publication number: 20140369911
    Abstract: A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, acetaldehyde, propianaldehyde, or butyraldehyde, and this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde.
    Type: Application
    Filed: January 15, 2014
    Publication date: December 18, 2014
    Inventors: Ponnaiyan Ayyappan, Danan Dou, Thomas Miller Harris