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:
Sep. 01, 1998
Filed:
Apr. 22, 1997
Harry Thomas Stephenson, Elkhart, IN (US);
Environmental Test Systems, Inc., Elkhart, IN (US);
Abstract
The present invention involves a unitized dry reagent test device and method for removing the interference caused by suspended particulate materials in the calorimetric determination of analytes in samples containing such materials. More specifically, the testing methodologies of the present invention comprise the use of a multilayer reagent impregnated matrix having known particulate removal characteristics attached to a test fluid impervious support means which has known light transmission characteristics. On-site or field testing of soil samples is an advantageous and representative application of the devices and methods of the present invention.