Patent application number | Description | Published |
20090205398 | Self Calibration Devices for Chemical and Bio analytical Trace Detection Systems - The present invention relates to chemical and bioanalytical sensors and sensor systems, particularly to systems incorporating a calibration device for sensors where the calibration device is composed of structures and materials for trapping and retaining calibrant materials until they are needed and released quantitatively. | 08-20-2009 |
20090272270 | MICROFABRICATED GAS CHROMATOGRAPH - The present invention is generally directed to a microfabricated gas chromatograph column having two patterned substrates, each optionally having a stationary phase material coating, bonded together to provide a continuous flow channel. The flow channel can have a serpentine arrangement or a modified serpentine arrangement comprising alternating series of consecutive turns in one direction where each series has enough turns to move carrier gas and analyte molecules from the center of the column cross section to an outer wall of the channel or from one outer wall of the channel to the opposite outer wall. Different portions of the substrates can be coated with differing thicknesses of stationary phase material and/or with different stationary phase materials. The column can have a circular cross-section or a semi-circular cross-section where the flat portion of the cross-section has grooves. Also disclosed is the related method of making the microfabricated gas chromatograph column. | 11-05-2009 |
20090301169 | SELECTIVE MEMBRANES/THIN FILMS FOR ANALYTICAL APPLICATIONS - Disclosed herein is a composition having: a polymer having a carbosilane or siloxane backbone and pendant hydrogen-bond acidic groups; and a filler material having polar groups. The polymer is not covalently bound to the filler material. | 12-10-2009 |
20100029884 | FIBER REINFORCEMENT WITH 1-SILACYCLOBUTANE CROSSLINK UNITS - Disclosed herein is a composition having a plurality of particles of a filler material and crosslinking units having the formula —(SiR—CH | 02-04-2010 |
20100044570 | DETECTION OF CHEMICALS WITH INFRARED LIGHT - The present invention is generally directed to a method for non-contact or stand off chemical detection that may be eye-safe by selectively exciting one ore more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte and determining if the analyte is present by comparing emitted photons with an IR detector signal made before and during or shortly after exciting the analyte. Another embodiment of the present invention provides a method for non-contact or stand off chemical detection that may be eye-safe by selectively exciting one or more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte, wherein the analyte is excited sufficiently to generate a vapor plume, and wherein the plume is examined to detect the presence of the analyte. The analyte of interest may be an explosive, an additive to an explosive, a drug, a chemical warfare agent, a biochemical, or a biological warfare agent. Additionally, the present invention provides for a system for non-contact or stand off chemical detection that may be eye-safe. | 02-25-2010 |
20100083736 | HYBRID PRECONCENTRATOR FOR DETECTION OF MATERIALS - A device having: one or more substrates in an enclosure having an inlet and an outlet; a template directed molecular imprinted material on the substrates; and a heater to heat the material. A method of: providing the above device including a sensor coupled to the outlet; flowing a gas though the device; heating the material; and flowing any vapor evolved from the material into the sensor. | 04-08-2010 |
20100139406 | Micromechanical chemical sensors with multiple chemoselective resonant elements and frequency division multiplexed readout - Micro-opto-mechanical chemical sensors and methods for simultaneously detecting and discriminating between a variety of vapor-phase analytes. One embodiment of the sensor is a photonic microharp chemical sensor with an array of closely spaced microbridges, each differing slightly in length and coated with a different sorbent polymer. The microbridges can be excited photothermally, and the microbridges can be optically interrogated using microcavity interferometry. Other actuation methods include piezoelectric, piezoresistive, electrothermal, and magnetic. Other read-out techniques include using a lever arm and other interferometric techniques. | 06-10-2010 |
20100236341 | ACTIVELY COOLED VAPOR PRECONCENTRATOR - An analyte collection system device includes an active area that includes a plurality of perforations extending therethrough. The plurality of perforations are arranged to permit passage of an analyte fluid flow through the microscale plate. A heating element is provided for heating the active area, and a thermal distribution layer is disposed over at least a portion of the active area. For cooling the active area at or below an ambient temperature, an active cooler is provided. | 09-23-2010 |
20110271738 | ANALYTE DETECTION WITH INFRARED LIGHT - The present invention is generally directed to a method for non-contact analyte detection by selectively exciting one or more analytes of interest using an IR source optionally operated to produce pulses of light and tuned to at least one specific absorption band without significantly decomposing organic analytes and determining if the analyte is present by comparing emitted photons with an IR detector signal collected one or more times before, during, after, or any combination thereof exciting the analyte. Another embodiment of the present invention provides a method for non-contact analyte detection by selectively exciting one or more analytes of interest using one or more IR sources that are optionally operated to produce pulses of light and tuned to at least one specific wavelength without significantly decomposing organic analytes, wherein the analyte is excited sufficiently to increase the amount of analyte in the gas phase, and wherein the content of the gas is examined to detect the presence of the analyte. | 11-10-2011 |
20120091344 | DETECTION OF CHEMICALS WITH INFRARED LIGHT - The present invention is directed to a method for non-contact or stand off chemical detection by selectively exciting one or more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte and determining if the analyte is present by comparing emitted photons with an IR detector signal made before and during or shortly after exciting the analyte. Another embodiment provides a method for non-contact or stand off chemical detection by selectively exciting one or more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte, wherein the analyte is excited sufficiently to generate a vapor plume, and wherein the plume is examined to detect the presence of the analyte. Additionally, the present invention provides for a system for non-contact or stand off chemical detection. | 04-19-2012 |
20120247230 | DETECTION OF CHEMICALS WITH INFRARED LIGHT - The present invention is directed to a method for non-contact or stand off chemical detection by selectively exciting one or more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte and determining if the analyte is present by comparing emitted photons with an IR detector signal made before and during or shortly after exciting the analyte. Another embodiment provides a method for non-contact or stand off chemical detection by selectively exciting one or more analytes of interest using an IR source tuned to at least one specific absorption band without significantly decomposing the analyte, wherein the analyte is excited sufficiently to generate a vapor plume, and wherein the plume is examined to detect the presence of the analyte. Additionally, the present invention provides for a system for non-contact or stand off chemical detection. | 10-04-2012 |
20140260535 | GAS CHROMATOGRAPHIC "IN COLUMN" SPECTROSCOPIC ANALYSIS - A chemical detector for rapid, simultaneous detection of multiple chemicals including chemical warfare agents, toxic industrial chemicals, and explosives having one or more gas chromatography columns each with a chemosorbent or a chemo-reactive stationary phase and an infrared-transparent base, a bright infrared light source, a mechanism to direct the light source to any point along any of the columns, and an infrared sensor. Another disclosed detector has one or more gas chromatography columns each on the surface of a substrate having at least one infrared-transparent waveguide pattern, a bright infrared light source, and at least one ring resonator for each column, where each ring resonator is coated with a chemosorbent or a chemo-reactive stationary phase, and where each ring resonator spectroscopically probes the stationary phase. Also disclosed are the related methods for chemical detection. | 09-18-2014 |