Diagnostic sanitary test strip
June 25, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIntegral analytical element A dry reagent delivery system with membrane having porosity gradient Test strip and fixture Assay kit including an analyte test strip and a color comparator Minimum procedure system for the determination of analytes Blood filtering metering device Constant volume chemical analysis test device Automated initiation of timing of reflectance readings Analytical device for the automated determination of analytes in fluids Minimum procedure system for the determination of analytes InventorsApplicationNo. 344895 filed on 06/25/1999US Classes:436/514, INVOLVING DIFFUSION OR MIGRATION OF ANTIGEN OR ANTIBODY422/55, Structured visual or optical indicator, per se422/56, Having reagent in absorbent or bibulous substrate422/57, Having coated reagent422/58, In holder or container having special form422/61, Test package or kit435/11, Involving cholesterol435/14, Involving glucose or galactose435/174, CARRIER-BOUND OR IMMOBILIZED ENZYME OR MICROBIAL CELL; CARRIER-BOUND OR IMMOBILIZED CELL; PREPARATION THEREOF435/180, Carrier is synthetic polymer435/287.1, Including measuring or testing435/287.2, Measuring or testing for antibody or nucleic acid, or measuring or testing using antibody or nucleic acid435/287.7, Including bibulous or absorbent layer435/287.8, Including multiple, stacked layers435/287.9, Including a coated reagent or sample layer435/805, TEST PAPERS435/810, PACKAGED DEVICE OR KIT435/970, TEST STRIP OR TEST SLIDE436/66, HEMOGLOBIN, MYOGLOBIN, OR OCCULT BLOOD436/71, LIPIDS, TRIGLYCERIDES, CHOLESTEROL, OR LIPOPROTEINS436/164, OPTICAL RESULT436/169, With reagent in absorbent or bibulous substrate436/170, Plural superposed layers436/518, INVOLVING AN INSOLUBLE CARRIER FOR IMMOBILIZING IMMUNOCHEMICALS436/531, Carrier is synthetic resin436/805, OPTICAL PROPERTY436/810, Tube, bottle, or dipstick436/815, TEST FOR NAMED COMPOUND OR CLASS OF COMPOUNDS436/827LECTINSExaminersPrimary: Chin, Christopher L.Attorney, Agent or FirmInternational ClassG01N 033/558AbstractAn improved multi-layered diagnostic sanitary test strip for receiving a heterogenous fluid, such as whole blood, to test for presence and/or amount of a suspected analyte in the fluid by facilitating a color change in the strip corresponding to the amount of the analyte in the fluid, wherein the test strip includes fluid volume control dams to prevent spillage of the fluid from the strip and a chemical reagent solution that facilitates end-point testing. The improved test strip comprises (a) an upper support strip having a fluid receiving port and (b) a lower support strip having a color change viewing port and securely sandwiched therebetween (c) a spreading mesh screen for uniformly distributing the fluid, (d) a chemically treated separating layer for removing an undesirable element, e.g. red blood cells, from the fluid received from the mesh screen, (e) an isotropic membrane chemically treated with a reagent indicator solution for removing any remaining portions of the undesirable element, producing a color change proportionate to the amount of the suspected analyte in the fluid and facilitating an end-point ramp test, and (f) volume control dam partitions for retaining fluid on and in the strip.Field of SearchStructured visual or optical indicator, per seHaving reagent in absorbent or bibulous substrate Having coated reagent In holder or container having special form Test package or kit Involving cholesterol Involving glucose or galactose CARRIER-BOUND OR IMMOBILIZED ENZYME OR MICROBIAL CELL; CARRIER-BOUND OR IMMOBILIZED CELL; PREPARATION THEREOF Carrier is synthetic polymer Including measuring or testing Measuring or testing for antibody or nucleic acid, or measuring or testing using antibody or nucleic acid Including bibulous or absorbent layer Including multiple, stacked layers Including a coated reagent or sample layer TEST PAPERS PACKAGED DEVICE OR KIT TEST STRIP OR TEST SLIDE HEMOGLOBIN, MYOGLOBIN, OR OCCULT BLOOD LIPIDS, TRIGLYCERIDES, CHOLESTEROL, OR LIPOPROTEINS OPTICAL RESULT With reagent in absorbent or bibulous substrate Plural superposed layers INVOLVING DIFFUSION OR MIGRATION OF ANTIGEN OR ANTIBODY INVOLVING AN INSOLUBLE CARRIER FOR IMMOBILIZING IMMUNOCHEMICALS Carrier is synthetic resin OPTICAL PROPERTY Tube, bottle, or dipstick TEST FOR NAMED COMPOUND OR CLASS OF COMPOUNDS LECTINS |
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