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:
May. 27, 1997
Filed:
Dec. 22, 1994
Dr agerwerk Aktiengesellschaft, L ubeck, DE;
Abstract
A unitary collection and displacement immunoassay device for determining a toxic substance adhered to aerosols in the air is provided. The device comprises an elongated body having proximal and distal ends and encloses a space defining a collection chamber, a reaction chamber and a measurement chamber, each chamber separated by a liquid flow barrier which delays liquid transport between chambers until a vacuum source is applied to the distal end of the test device to pull liquid into the next chamber. The collection chamber contains a solution for solubilizing the toxic substance from the aerosols and a semi-permeable means for separating the solubilized toxic substance from the aerosols. The reaction chamber contains a labelled immunoreactant bound to a solid phase carrier material. The labelled reagent can be displaced by the solubilized toxic substance. The measurement chamber contains a color generating system which reacts with displaced labelled reagent to produce a colored product in proportion to the concentration of the toxic substance.