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Solid-phase analytical device and method for using same

  • US 4,916,056 A
  • Filed: 03/28/1988
  • Issued: 04/10/1990
  • Est. Priority Date: 02/18/1986
  • Status: Expired due to Term
First Claim
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1. A solid phase assay device for use in a binding assay to determine the presence or amount of an analyte in a fluid sample through the use of a label capable of producing a detectable response, said device comprising a reaction site on a porous matrix having,a negative control area,a positive control area within said negative control area containing immobilized binding reagent for said label, andan analyte binding area within said negative control area containing immobilized binding reagent for analyte in the sample,said positive control area being shaped such that, in the presence or absence of analyte in the sample and in the presence of said label, a minus symbol is formed representing a negative result, andsaid analyte binding area being shaped such that, taken together with said minus symbol in the presence of said label and analyte, a plus symbol is formed representing a positive result.

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