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:
Dec. 26, 2017
Filed:
Dec. 23, 2010
Ronald Waldo Sarver, Jr., Dexter, MI (US);
Alexandr Y. Kariagin, East Lansing, MI (US);
Christine Claire Cooper, Williamston, MI (US);
Susan Teruko Mcdougal, Novi, MI (US);
Ronald Waldo Sarver, Jr., Dexter, MI (US);
Alexandr Y. Kariagin, East Lansing, MI (US);
Christine Claire Cooper, Williamston, MI (US);
Susan Teruko McDougal, Novi, MI (US);
NEOGEN CORPORATION, Lansing, MI (US);
Abstract
The disclosure generally relates to a test device that detects microorganism growth by detecting a gas metabolite (e.g., carbon dioxide) produced during the growth of bacteria or other microorganism in a tested sample. The test device can contain a culture growth media separated from a detection area by a gas-permeable membrane. The gas-permeable membrane permits carbon dioxide to permeate into the detection area. The detection area includes a solidified mixture of pH indicators and a gelling agent in the form of a semi-permeable matrix. The optical properties, including the absorbance of light at various wavelengths, of the detection solution change with alterations in carbon dioxide concentration. This test device can then be placed in an incubation and optical detection instrument to monitor changes in optical properties of the detection are induced during microorganism growth in the culture medium.