The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1998
Filed:
Jun. 16, 1994
Richard Calvin Sutton, Rochester, NY (US);
Margaret Jeanette Smith-Lewis, Pittsford, NY (US);
Linda Ann Mauck, Rochester, NY (US);
Wayne Arthur Bowman, Walworth, NY (US);
Susan Jean Danielson, Rochester, NY (US);
Johnson & Johnson Clinical Diagnostics, Inc., Rochester, NY (US);
Abstract
A dry immunoassay analytical element, for assaying a ligand is disclosed. The element comprises, in the following order, (a) a layer containing a labeled ligand, (b) a bead spreading layer, c) a cross-linked hydrophilic polymer layer and d) a support; wherein (i) a fixed concentration of an immobilized receptor for the labeled ligand is located in a zone at the interface of layers (b) and (c); and (ii) the receptors are immobilized by being covalently bonded to polymeric beads that are smaller than the beads in layer (c).