US PATENT SUBCLASS 435 / 7.94
.~.~.~.~ Sandwich assay

Current as of: June, 1999
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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

4  DF  MEASURING OR TESTING PROCESS INVOLVING ENZYMES OR MICRO-ORGANISMS; COMPOSITION OR TEST STRIP THEREFORE; PROCESSES OF FORMING SUCH COMPOSITION OR TEST STRIP {15}
7.1  DF  .~ Involving antigen-antibody binding, specific binding protein assay or specific ligand-receptor binding assay {9}
7.9  DF  .~.~ Assay in which an enzyme present is a label {2}
7.92  DF  .~.~.~ Heterogeneous or solid phase assay system (e.g., ELISA, etc.) {3}
7.94.~.~.~.~ Sandwich assay

DEFINITION

Classification: 435/7.94

Sandwich assay:

(under subclass 7.92) Subject matter in which the heterogeneous or solid phase assay involves the binding of polyvalent analyte antigen to an antibody and a labeled antibody to obtain a measurable antibody-antigen-antibody complex; alternatively, a second unlabeled antibody and a third labeled anti-antibody can be reacted with the antigen-antibody complex to obtain a measurable result.