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. 05, 2016
Filed:
Mar. 22, 2013
Applicant:
Surmodics, Inc., Eden Prairie, MN (US);
Inventors:
Gary Opperman, St. Louis Park, MN (US);
Wendy Nelson, Woodbury, MN (US);
Assignee:
SURMODICS IVD, INC., Eden Prairie, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/78 (2006.01); C12Q 1/28 (2006.01); G01N 33/58 (2006.01); G01N 33/52 (2006.01); G01N 33/535 (2006.01); G01N 33/558 (2006.01);
U.S. Cl.
CPC ...
G01N 33/581 (2013.01); C12Q 1/28 (2013.01); G01N 21/78 (2013.01); G01N 33/52 (2013.01); G01N 33/535 (2013.01); G01N 33/558 (2013.01);
Abstract
The invention provides compositions, kits, and methods for performing colorimetric analysis. A substrate is reacted to generate a chromogenic reaction product, and a reaction stop reagent that is a sulfonic acid is added to stop and stabilize the reaction product. The absorbance properties of the chromogenic reaction product can be maintained over significantly longer periods of time of that of conventional reagents and methods. The sulfonic acid can be used in assays such as ELISAs in order to provide a more accurate and safer detection of analytes in a biological sample.