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.

Date of Patent:
Jan. 30, 2001

Filed:

Oct. 01, 1998
Applicant:
Inventors:

Chares S. Leveritt, Jarrettsville, MD (US);

Steven W. Bunte, Baltimore, MD (US);

Eugene F. Rothgery, N. Branford, CT (US);

Carl G. Seefried, Southbury, CT (US);

Nathan Klein, Baltimore, MD (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C06B 3/100 ; C06B 3/102 ; C07F 9/58 ; C07F 9/28 ; C07F 5/02 ;
U.S. Cl.
CPC ...
C06B 3/100 ; C06B 3/102 ; C07F 9/58 ; C07F 9/28 ; C07F 5/02 ;
Abstract

The stability of HAN, HAN derivatives or hydroxylamine, and compositions comprising these is considerably enhanced by employing a stabilizing effective amount of a stabilizer selected from (a) a pyridine or pyridone salt, or an acid thereof; (b) a diphosphonate or methylenephosphonate salt, or an acid thereof; or (c) a mixture of two or more stabilizers, wherein at least one is selected from (a) and at least one is selected from (b). Stabilized HAN, HAN derivatives, or hydroxylamine or compositions comprising HAN, an HAN derivative or hydroxylamine, along with a process for providing these stabilized compositions is described. A stabilizer mixture having enhanced, synergistic stabilizing properties is described as well.


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