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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8961818 B1

PDFFull Text
Date of Patent:
Feb. 24, 2015

Filed:

Jun. 17, 2013

Diesel exhaust fluid formulation that reduces urea deposits in exhaust systems

Applicant:

Deere & Company, Moline, IL (US);

Inventors:

Ponnaiyan Ayyappan, Cedar Falls, IA (US);

Danan Dou, Cedar Falls, IA (US);

Thomas Miller Harris, Waterloo, IA (US);

Assignee:

Deere & Company, Moline, IL (US);

Attorney:

Faegre Baker Daniels LLP

Primary Examiner:

Timothy Vanoy

Int. Cl.
CPC ...
B01D 53/92 (2006.01); B01D 53/94 (2006.01); C09K 3/00 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01);
U.S. Cl.
CPC ...
B01D 53/9431 (2013.01); F01N 3/2066 (2013.01);
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.

Find Patent Forward Citations

Ayyappan, Ponnaiyan. (2015). Diesel exhaust fluid formulation that reduces urea deposits in exhaust systems (U.S. Patent No. 8961818). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8961818

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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