Patent ID: 7595201

Claim:
An immunoassay kit for detecting an analyte in a test sample, comprising: i. a first strip including a test patch that contains a predetermined amount of an antibody specifically binding to the analyte, wherein the antibody is linked to a reporter molecule capable of releasing a signal, and ii. a second strip made of an absorbent material for absorbing the test sample the second strip being configured to be separable from the first strip, wherein after contacting the first strip for a fixed time period with the second strip absorbed with the test sample and then separating them, the antibody bound to the analyte moves from the first strip to the second strip and the antibody not bound to the analyte remains on the first strip, the level of signal released from the reporter molecule linked to the antibody remaining on the first strip being inversely proportional to the amount of the analyte in the test sample.