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| Number | Title | Issue Date |
| 7435225 | Method and arrangement for measuring breath gases of a patient Method and arrangement for measuring breath gases of a patient in which the patient is connected to a breath gas unit by using a sampling line to enable flowing a sample of the breathing gases with a pre-determined sample flow rate to the breath gas measuring unit. ... | 10/14/2008 |
| 7382900 | Method of determining a three-dimensional velocity field in a volume A method of determining a three-dimensional velocity field in a volume having particles, the particles within the volume being excited to radiate by illuminating the volume, including two or more cameras simultaneously capturing images of the observation volume at t... | 06/03/2008 |
| 7225085 | Precision gas flow meter A precision gas flow meter that is capable of measuring small flow rates of gasses precisely in the range of 0.01 to 10 L per minute. The meter is designed to measure the gas flow in small volume increments of predetermined value, and therefore can be used to measur... | 05/29/2007 |
| 7194890 | Gas chromatograph and expired air component analyzer A gas chromatograph having the capability of performing a reliable measurement under a condition that the baseline of a detector output is stabilized, and a breath component analyzer using the same are provided. This gas chromatograph comprises a gas separation colu... | 03/27/2007 |
| 7104112 | Phased micro analyzer IV A fluid analyzer having a concentrator and separator for concentrating and separating fluid samples at pressures up to about 10,000 psi (˜700 bar). The concentrator and separator may consist of a solid-state thin-film heater-adsorber and a channel supported by a so... | 09/12/2006 |
| 7012418 | Measuring system with ratiometric frequency output A measuring device, with a digital interface for the transmission of digital signals to an evaluation unit, is disclosed, whereby the interface includes a clock input, to which a system clock signal is fed, a signal input, to which a measured signal is applied, an a... | 03/14/2006 |
| 7000452 | Phased micro fluid analyzer A micro fluid analyzer having a concentrator and separator. A strip continuous through a channel in the concentrator may provide a hot zone that may move with the flow of fluid through the channel of the concentrator to provide a concentration of heat in the flow. A... | 02/21/2006 |
| 6725704 | Gas analyzer A gas analyzer has a measuring chamber, a gas inlet channel, a gas outlet channel, a pump for providing a gas flow through the chamber, a device for irradiating the gas in the chamber with pulsating electromagnetic energy to generate acoustic pressure fluctuations t... | 04/27/2004 |
| 6386014 | Energy measurement device for flowing gas using microminiature gas chromatograph A system for determining the energy and volume delivered by a flowing natural gas carried within a pipeline based on BTU content analysis of the natural gas using a micro-miniature gas chromatograph. By monitoring key parameters of the flowing natural gas... | 05/14/2002 |
| 5983700 | Calibration method of a flow sensor output A method of calibrating a zero point of a flow sensor includes the steps of detecting a transition of output of the flow sensor caused in response to a shut down of a fluid, and adjusting the zero point of a characteristic curve representing the output of... | 11/16/1999 |
| 5938817 | Gas chromatograph A gas chromatograph has a sample vaporization chamber connected to a column for vaporizing a liquid sample injected therein and introducing this vaporized liquid sample with a carrier gas into the column. There is also a flow rate control device for contr... | 08/17/1999 |
| 5827946 | Method for sample identification using a locked retention time database The invention provides a method for developing a retention time database of identified analytes and their respective retention times in a reference Gas Chromatograph (GC) system under locked conditions for identification of unknown analytes of interest el... | 10/27/1998 |
| 5652443 | Sensor having a micro-bridge heater A sensor including a micro-bridge heater which is located above a depression in the surface of a substrate. The heater includes a first insulating film on the substrate, a conductive film on the first insulating film, and a second insulating film on the c... | 07/29/1997 |
| 5542286 | Method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph A method and apparatus for correcting flow and pressure sensor drift in a gas chromatograph. At a convenient time when the chromatograph is not being used for analysis, the input valves controlling the input into the chromatograph are shut, reducing inter... | 08/06/1996 |
| 5476000 | Retention time stability in a gas chromatographic apparatus The effect of barometric pressure variation on the retention time stability of a chromatographic analytical system is compensated by active control of the amount of fluid flow by way of a fluid flow controller, preferably in the form of an electronic pres... | 12/19/1995 |
| 5441890 | Dynamical destabilization of systems characterized by kinetically coupled components using a differential flow A method of destabilizing the homogeneous steady state of a dynamical system with two or more dynamically coupled variables through the action of a differential bulk flow of the key species, termed Differential Flow Induced Instability (DIFII), is disclos... | 08/15/1995 |
| 5340543 | Modular gas chromatography device A chromatography device for separating sample fluids from carrier fluids and analyzing the sample is configured so that it is a modular unit. This modularity enables repairs to be quickly effected on the unit and also greatly simplifies the task of access... | 08/23/1994 |
| 5166076 | Device and method for sample dosing in gas chromatography A dosing device has a flow divider connected between a carrier gas source and a gas chromatography separating column, in particular a capillary column. The flow divider has a conduit with an opening and a chamber surrounding said conduit with a delivery l... | 11/24/1992 |
| 5040126 | Method for predicting steady-state conditions To stabilize flow rate in a single-stroke, syringe-type high pressure pump to a constant value after turn-on, a control system; (1) in one embodiment, senses the maximum rate of change of pressure, detects a pressure when the rate of change is two-thirds ... | 08/13/1991 |
| 4872334 | Variable flow capillary gas chromatography method A method for temperature programmed capillary column gas chromatography characterized in that carrier gas is flowed in an amount greater than that under normal separation conditions for a term starting from before injection of a sample or immediately afte... | 10/10/1989 |
| 4760732 | Flow programmer for gas chromatography A flow programmer for gas chromatography of the type having a mass flow meter for controlling the flow rate of a gas chromatography carrier gas controllable at a selected carrier gas flow rate program by an electrical input to the mass flow meter and an e... | 08/02/1988 |
| 4708013 | Liquid water content analyzer A method of measuring the amount of liquid water in an aerosol begins with removing adsorbed water and water vapor from a sample chamber. A first sample flow of the aerosol is directed through the sample chamber at a first flow rate for a first time perio... | 11/24/1987 |
| 4271695 | Apparatus for feeding carrier gas to on-column injectors An apparatus for feeding carrier gas at a constant rate to on-column injectors for capillary and micropacked gas-chromatographic columns. The apparatus includes a constant pressure gas delivering device in operation during the sample injection, and a cons... | 06/09/1981 |
| 4215563 | Chromatographic analysis normalizer In a chromatographic analysis system a bypass conduit operating in parallel with a chromatographic separation column diverts a portion of the sample fluid directly to the chromatographic detector prior to elution through the chromatographic separation col... | 08/05/1980 |
| 4095455 | Pneumatic detector for chromatographic analyzer A gas chromatograph having a pneumatic detector adapted to produce a component concentration measurement signal that is relatively unaffected by changes in carrier flow rate. The detector includes an orifice connected in the flow stream at the output end ... | 06/20/1978 |
| 4059994 | Pneumatic chromatograph An all-pneumatic process chromatograph having a pneumatically-actuated sample-injection valve, an orifice connected in the column output line to develop a pressure signal corresponding to fluid density, a pneumatic amplifier for strengthening the pressure... | 11/29/1977 |
| 4045998 | Temperature control system A chromatographic analyzer for use in an explosive atmosphere is provided with a double-walled, dual passage helix heat exchanger. A heat exchange fluid, such as steam, is passed through one passage of the helix. A second fluid, such as air, is passed thr... | 09/06/1977 |
| 4033171 | Pneumatic detector for chromatographic analyzer A gas chromatograph having a pneumatic detector adapted to produce a component concentration measurement signal that is relatively unaffected by changes in carrier flow rate. The detector includes an orifice connected in the flow stream at the output end ... | 07/05/1977 |
