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:
Jan. 30, 2001
Filed:
Sep. 03, 1999
Bala S. Manian, Los Altos Hills, CA (US);
Biometric Imaging, Inc., Mountain View, CA (US);
Abstract
A method and assay system for the displacement of background from the area surrounding target material allows more sensitive detection. The invention is for use with a system in which specific targets localized at a depth within a container are detected in a liquid containing background material that produces an optical background signal. A displacement liquid is introduced that has a density selected to form a layer encompassing the target material and displacing the material that produces the background signal. The layer of the displacement liquid is sufficient to displace background material from a depth exceeding the depth of field of the detection system. The target material is then optically detected at the depth containing the target material with diminished background allowing greater detection sensitivity.