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.:
Date of Patent:
Jan. 11, 1994
Filed:
Nov. 23, 1992
Applicant:
Inventors:
Leonard Dubin, Skokie, IL (US);
John E Hoots, St. Charles, IL (US);
Assignees:
Nalco Chemical Company, Naperville, IL (US);
Nalco Fuel Tech, Naperville, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
F23J / ;
U.S. Cl.
CPC ...
110345 ; 110341 ; 431-2 ; 422-3 ; 422168 ; 423235 ;
Abstract
In a furnace (boiler) installation where oxides of nitrogen are to be reduced to elemental nitrogen by treatment with a reactant such as a solution of urea, the desired amount of reactant (dependent on furnace specifics) is determined by comparing the fluorescent light intensity of a sample of the treating solution to the fluorescent light intensity of a calibration standard representing the desired amount of reactant concentration; in the case of non-comparison the concentration of reactant in the treating solution is altered until the intensities are substantially identical.