Use of thermochromic liquid crystals in reflectometry based diagnostic methods
Patent 5972715 Issued on October 26, 1999. Estimated Expiration Date: 
December 23, 2016. 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.
December 23, 2016. 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 ReferencesLiquid crystal film laminate Analytical assay 5547283 InventorsAssigneeApplicationNo. 773269 filed on 12/23/1996US Classes:436/164, OPTICAL RESULT374/161, Change of optical property374/162, Color422/82.05, Measuring optical property by using ultraviolet, infrared, or visible light422/82.09, Absorbance or transmittance435/4, MEASURING OR TESTING PROCESS INVOLVING ENZYMES OR MICRO-ORGANISMS; COMPOSITION OR TEST STRIP THEREFORE; PROCESSES OF FORMING SUCH COMPOSITION OR TEST STRIP435/25, Involving oxidoreductase436/46, With sample on test slide436/63, BIOLOGICAL CELLULAR MATERIAL TESTED436/165, With claimed manipulation of container to effect reaction or use of container of claimed optical structure436/169With reagent in absorbent or bibulous substrateExaminersPrimary: Warden, JillAssistant: Carrillo, Sharidan Attorney, Agent or FirmForeign Patent References
International ClassG01N 021/00AbstractA method for improving the accuracy of temperature sensitive diagnostic assays which are carried out using reflectance spectrometers to detect color changes in a solid test system which has been contacted with a fluid test system suspected of containing an analyte whose presence and/or concentration is being sought. The method involves determining the temperature of the solid test material by measuring the reflectance of a thermochromic liquid crystal in close proximity to the solid test material and correcting the result of the assay for a change in temperature from a pre-selected nominal temperature.Other References
Field of SearchWith sample on test slideBIOLOGICAL CELLULAR MATERIAL TESTED OPTICAL RESULT With claimed manipulation of container to effect reaction or use of container of claimed optical structure With reagent in absorbent or bibulous substrate Measuring optical property by using ultraviolet, infrared, or visible light Absorbance or transmittance Change of optical property Color MEASURING OR TESTING PROCESS INVOLVING ENZYMES OR MICRO-ORGANISMS; COMPOSITION OR TEST STRIP THEREFORE; PROCESSES OF FORMING SUCH COMPOSITION OR TEST STRIP Involving oxidoreductase |
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