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:
Aug. 03, 1993
Filed:
May. 09, 1991
Hans-Erich Wilk, Einhausen, DE;
Erich Schneider, Mannheim, DE;
Andreas Marschall, Mannheim, DE;
Manfred Bleisteiner, Mannheim, DE;
Boehringer Mannheim GmbH, Mannheim, DE;
Abstract
Test carrier for the analytical determination of a constituent of a sample fluid by a specific binding reaction between two binding partners having biological affinity. A plurality of test layers is so disposed that they are wetted successively by the fluid and form a fluid transport path, in which one of the test layers is a fixing layer (18) which is a porous carrier matrix. The first of the two binding partners is fixed to the latter. The fluid containing the second binding partner flows through the fixing layer (18), at right angles to its surface, on the test carrier (10). A largely complete binding reaction in an extraordinarily short time is achieved during the flow through the preferably very thin fixing layer (18) by the fact that a microporous plastics layer with a pore size P of at least 0.01 pm is used as the carrier matrix, and at the same time the size D of the second binding partner and the pore size P of the plastics layer are adjusted to one another so that the pore size P is at least twice and at most ten times as great as the size D of the second binding partner.