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:
Aug. 16, 2016
Filed:
Oct. 20, 2014
Applicant:
United States Gypsum Company, Chicago, IL (US);
Inventors:
Michael F. Jankowski, Mundelein, IL (US);
Renee J. Weinberger, Waukegan, IL (US);
Assignee:
UNITED STATES GYPSUM COMPANY, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/24 (2006.01); G01N 33/22 (2006.01); G01N 31/22 (2006.01); G01N 21/78 (2006.01);
U.S. Cl.
CPC ...
G01N 33/24 (2013.01); G01N 21/78 (2013.01); G01N 31/22 (2013.01); Y10T 436/188 (2015.01);
Abstract
A method for rapid detection of sulfur in a gypsum sample by causing emission of sulfur from the sample as vapors, reacting the vapors with silver nitrate and detecting sulfur by monitoring for color change. A kit for rapid detection of sulfur in a gypsum sample is also provided. Further methods include those in which the amount of sulfur in a gypsum sample is quantified in colorimetric analysis with silver nitrate and gypsum standards with known concentrations of sulfur.