Patent ID: 7344893

Claim:
A chromatographic specific binding assay strip device comprising a laminate strip having a first side and an opposite second side, said laminate strip comprising: (a) a fibrous conjugate pad comprising a colloidal labeled immunological binding reagent, said fibrous conjugate pad is disposed on said first side of said laminate; said fibrous conjugate pad has a first end and a second end, and is adapted to receiving a liquid sample applied directly thereto; (b) a fibrous sample receiving pad disposed on said second side of the laminate; said fibrous sample receiving pad is in liquid communication with at least the first or second end of the fibrous conjugate pad; (c) a fibrous reservoir pad disposed on the second side of said laminate and (d) a fibrous detection pad disposed between said fibrous sample pad and said fibrous reservoir pad; wherein said sample receiving pad, fibrous detection pad and fibrous reservoir pad are in capillary liquid communication facilitating a unidirectional migration of liquid from the sample receiving pad through the detection pad into the reservoir pad.