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. 10, 1999
Filed:
Dec. 10, 1997
Applicant:
Inventor:
Jenefir D Isbister, Potomac, MD (US);
Assignee:
George Mason University, Fairfax, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; C12Q / ; C12Q / ;
U.S. Cl.
CPC ...
435-737 ; 422 8205 ; 422 8208 ; 435-4 ; 435-45 ; 435-735 ; 435 18 ; 435 34 ; 435 38 ; 435 39 ;
Abstract
A semi-quantitative method for determining the concentration of viable coliforms or E. coli in a liquid is provided. The sample to be tested is mixed with an indicator reagent which includes a specific indicator compound that undergoes a change that is detectable by spectrophotometric or visual methods upon cleavage by a beta galactosidase enzyme found in coliforms or a beta glucuronidase enzyme unique to E. coli.