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:
May. 21, 2024
Filed:
Aug. 06, 2018
Applicant:
Innospec Limited, Ellesmere Port, GB;
Inventor:
Philip Maltas, Ellesmere Port, GB;
Assignee:
INNOSPEC LIMITED, Ellesmere Port, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/78 (2006.01); G01N 21/27 (2006.01); G01N 21/29 (2006.01); G01N 33/28 (2006.01);
U.S. Cl.
CPC ...
G01N 21/78 (2013.01); G01N 21/272 (2013.01); G01N 21/293 (2013.01); G01N 33/2823 (2013.01); G01N 33/287 (2013.01);
Abstract
A method for determining the presence of an acidic sulfide species in a liquid sample of an industrial or environmental material. The method includes the step of contacting the sample or an extract thereof with a composition including a metal complex dye compound in which the electromagnetic absorption spectrum of the metal complex dye compound changes upon reaction with an acidic sulfide species.