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| Number | Title | Issue Date |
| 4980278 | Method of effecting immunological analysis and apparatus for carrying out the same A method for analyzing antigen or antibody contained in a sample by introducing a first end surface of at least one measuring light guide member and a second end surface of at least one reference light guide member in the sample. Each of said measuring an... | 12/25/1990 |
| 4929562 | Method and apparatus for detecting gem-polyhalogenated hydrocarbons A method and optrode for detecting gem polyhalogenated hydrocarbons in a sample fluid based on a single phase Fujiwara reaction as provided. The method comprises contacting a reaction mixture with a sample fluid which contains the gem-polyhalogenated hydr... | 05/29/1990 |
| 4929561 | Absorption-emission optrode and methods of use thereof A method and apparatus for monitoring the physical and chemical properties of a sample fluid by measuring an optical signal generated by a fluorescent substance and modulated by an absorber substance. The emission band of the fluorescent substance overlap... | 05/29/1990 |
| 4925268 | Fiber-optic physiological probes Fiber-optic sensors suitable for monitoring physiological analyte concentration. An analyte-permeable matrix is disposed in the light path defined by the axial core at one end of an optical fiber segment. The matrix contains an indicator molecule covalent... | 05/15/1990 |
| 4851195 | Carbon dioxide sensor A sensor for determining the partial pressure of carbon dioxide in a liquid, which comprises a carbon dioxide - permeable, liquid and ion-impermeable membrane enveloping an aqueous medium containing an absorber, a fluorescer and a source of bicarbonate io... | 07/25/1989 |
| 4818710 | Method for optically ascertaining parameters of species in a liquid analyte An optical waveguide with one or more coatings of reactants specific to species to be analyzed in a liquid analyte immersed therein. A light signal carried by the waveguide undergoes interaction either with the bulk analyte whereby a first signal in conne... | 04/04/1989 |
| 4803049 | pH-sensitive optrode An apparatus is provided for remotely monitoring pH. A support material is provided on which organic dye molecules are covalently attached at a surface density falling within a predetermined range. The pH dependent fluorescence response of the bound organ... | 02/07/1989 |
| 4762799 | Method and device for fluorescence determination of alkali metal cations The concentration of a selected alkali metal cation in an aqueous sample is determined using an aqueous fill solution containing a dissolved polymeric cationic material (e.g., copper--PEI) and a dissolved fluorescent anionic material (e.g., ANS) and, in c... | 08/09/1988 |
| 4666672 | Optrode for sensing hydrocarbons A two-phase system employing the Fujiwara reaction is provided for the fluorometric detection of halogenated hydrocarbons. A fiber optic is utilized to illuminate a column of pyridine trapped in a capillary tube coaxially attached at one end to the illumi... | 05/19/1987 |
| 4577109 | Remote multi-position information gathering system and method A technique for gathering specific information from various remote locations, especially fluorimetric information characteristic of particular materials at the various locations is disclosed herein. This technique uses a single source of light disposed at... | 03/18/1986 |
| 4548907 | Fluorescent fluid determination method and apparatus A fluorescence-based optical sensor includes a membrane immobilized fluorophor secured to one end of a bifurcated fiber optic channel for exposure to the sample to be analyzed. The fiber optic channel also has an input end coupled to a radiation source ar... | 10/22/1985 |
| 4509370 | Pressure-sensitive optrode Apparatus and method for sensing changes in pressure and for generating optical signals related to changes in pressure. Light from a fiber optic is directed to a movable surface which is coated with a light-responsive material, and which moves relative to... | 04/09/1985 |
| 4306877 | Optical measurement of concentration The concentration of a substance of interest is measured by exposing a peable-membrane face of an indicator chamber containing an indicator to the substance, monochromator radiation being incident upon the indicator through a transparent wall of the indi... | 12/22/1981 |
| 4272484 | Filling for optodes In order to improve the selectivity of an indicator chamber or optode conting of an indicator and a membrane impermeable to the indicator and surrounding it, for use in the measurement of concentration of component particles by means of an optical light ... | 06/09/1981 |
