A method and apparatus for conducting specific binding pair assays, such as immunoassays, is described. A porous membrane capable of non-bibulous lateral flow is used as assay substrate; a member of the binding pair is affixed in an indicator zone defined in the substrate. The sample is applied at a...http://www.google.ca/patents/US4943522?utm_source=gb-gplus-sharePatent US4943522 - Lateral flow, non-bibulous membrane assay protocols
