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| Number | Title | Issue Date |
| 8148167 | Fluorescent pH detector system and related methods Fluorescent pH detector and methods for measuring pH using the fluorescent pH detector. ... | 04/03/2012 |
| 8148166 | Method and apparatus for measuring pH of low alkalinity solutions Systems and methods are described for measuring pH of low alkalinity samples. The present invention provides a sensor array comprising a plurality of pH indicators, each indicator having a different indicator concentration. A calibration function is generated by app... | 04/03/2012 |
| 8148165 | Apparatus and method for measuring concentration of carbon dioxide in water An apparatus for measuring the concentration of carbon dioxide in water that can correct a reduction in measurement accuracy based on deterioration of a pH indicator is provided. A carbon dioxide concentration measurement apparatus includes a deterioration determini... | 04/03/2012 |
| 8076153 | Method and apparatus for measuring pH of low alkalinity solutions Systems and methods are described for measuring pH of low alkalinity samples. The present invention provides a sensor array comprising a plurality of pH indicators, each indicator having a different indicator concentration. A calibration function is generated by app... | 12/13/2011 |
| 7968346 | Fluorescent pH detector system and related methods Fluorescent pH detector and methods for measuring pH using the fluorescent pH detector. ... | 06/28/2011 |
| 7947508 | Systems and methods for intra-oral diagnosis Devices, systems, and methods are disclosed for intra-orally diagnosing a body condition. ... | 05/24/2011 |
| 7943391 | Method of performing in situ calibrated potentiometric pH measurements A device for the precise and accurate potentiometric pH measurements in situ. Embodiments of a potentiometric device according to the invention consist of one or more glass pH-sensitive electrodes connected to a potentiometer. A key feature of the device is that, ra... | 05/17/2011 |
| 7932094 | Method and apparatus for determining the stability of an electroless plating bath The stability of an electroless plating bath for depositing a metal (e.g., nickel) is determined by titrating a sample of the plating bath with a titrant comprising ions of a catalytic metal (e.g., palladium) and detecting hydrogen released at the titration endpoint... | 04/26/2011 |
| 7906340 | Method for quantitative determination of hydrogen peroxide using potentiometric titration An electrochemical potentiometric titration method that entails titration of a known volume of a catholyte containing an unknown amount of hydrogen peroxide in a titration cell having two electrodes, a platinum working electrode and a silver/silver chloride referenc... | 03/15/2011 |
| 7883898 | Method and apparatus for measuring pH of low alkalinity solutions Systems and methods are described for measuring pH of low alkalinity samples. The present invention provides a sensor array comprising a plurality of pH indicators, each indicator having a different indicator concentration. A calibration function is generated by app... | 02/08/2011 |
| 7727770 | System and method for spectrophotometric measurement of total alkalinity using a liquid core waveguide A system and method for spectrophotometrically measuring the total alkalinity of a liquid sample. In a particular aspect, the method involves equilibration of a CO2 gas with a sample solution across the permeable walls of a Teflon AF 2400 liquid core wave... | 06/01/2010 |
| 7723119 | Method for determining solubility of a chemical compound There is provided a method of determining the solubility of a chemical compound containing one or more acidic or basic groups. The method involves preparing a close to saturated solution with solid present of said chemical compound; measuring the pH of the test solu... | 05/25/2010 |
| 7691642 | Spectrophotometric method and apparatus for the cross-matching of platelets A method and apparatus for characterizing the type of a blood sample and a variety of blood components are provided wherein a transmission spectrum of the sample is collected over a predetermined wavelength range. For blood typing, this spectrum is then compared wit... | 04/06/2010 |
| 7670845 | Indicator granular material The present invention relates to indicator granular material, especially for a cat lavatory, in which at least one first granular material is substantially completely coated with a first polymer layer, which is solid at a first pH and is dissolved at a second pH; an... | 03/02/2010 |
| 7622305 | Multiple acid solution characterization Embodiments of techniques for determining the concentrations of one or more acid components of a multiple acid solution are presented herein. ... | 11/24/2009 |
| 7608460 | Fluorescent pH detector system and related methods Fluorescent pH detector and methods for measuring pH using the fluorescent pH detector. ... | 10/27/2009 |
| 7595196 | Lateral flow assay devices with inhibiting backflow of the sample and methods of use The present invention is directed novel lateral flow devices for analyzing liquid samples. The devices contain chemical test strips and are useful for testing liquids for physical properties, such as pH, specific gravity, contamination or adulteration, the presence ... | 09/29/2009 |
| 7432109 | Spetroscopic pH measurement using optimized mixtures of reagents to extend measurement range An indicator mixture that allows pH measurement over a broader range of pH or to a higher accuracy than available using conventional spectroscopic techniques. In particular, the mixture of the present invention is comprised of two or more reagents such that when com... | 10/07/2008 |
| 7407626 | Composition and method of use of medical test kit A medical test kit includes a glucose testing composition, a protein testing composition, a bilirubin testing composition, a bilinogen testing composition, an amylase testing composition, a blood testing composition, a calcium testing composition, a nitrite testing ... | 08/05/2008 |
| 7390462 | Ratiometric fluorescent pH sensor for non-invasive monitoring The present invention provides ratiometric fluorescent pH sensors for non-invasive, continuous monitoring of pH in such applications as fermentation processes. The ratiometric fluorescent pH sensors comprise a fluorescent dye that exhibits a shift in excitation wave... | 06/24/2008 |
| 7349760 | System and method for sensing and controlling the concentration of a chemical agent in a solution A system for measuring and controlling the concentration of a chemical agent in a solution has a reaction cell for receiving a sample, a titrant dropper for releasing one or more drops of titrant into the sample, a first photosensor for sensing disruptions of light ... | 03/25/2008 |
| 7319037 | Fluid tester and method of use Fluid testing device for determining the value of each of a plurality of properties of a fluid, the fluid testing device including a planar base and a plurality of test sections, located on the planar base, each of the test sections including a test sub-section whic... | 01/15/2008 |
| 7291502 | Method for performing a non-invasive blood gas test A non-invasive blood gas test is carried out by a method that utilizes a venous blood sample together with a pulse oximeter and a plurality of mathematical equations. The method generates the following data points of the blood: (i) the pH level; (ii) the [H+] concen... | 11/06/2007 |
| 7282367 | Method for verifying amount of sample solution, method for controlling measurement system and method for measuring concentration of solution in apparatus for measuring optical characteristic A verification method of a sample solution amount includes the steps of: detecting at least one of a transmitted light component, a scattered light component and a reflected light component of a light by a photosensor while irradiating a sample solution, which is be... | 10/16/2007 |
| 7279523 | 2-cyanoacrylate-based composition, method and agent for evaluating curing thereof A 2-cyanoacrylate-based composition comprises a coloring material that changes color with curing of 2-cyanoacrylate. The composition has good visibility and excellent workability as it is colored before curing, and changes color with curing as it becomes colorless o... | 10/09/2007 |
| 7267803 | Degassing apparatus A degassing apparatus for use with a polymerisation reactor is disclosed. Slurry from the reactor is discharged into a flask tank (3) in which monomers or dilluent vaporise to form a gas. Filler units (9, 10) are provided at the upper part of the flash... | 09/11/2007 |
| 7253003 | Method for monitoring the environment within a microfluidic device A method and apparatus is provided for monitoring the environment within a microfluidic device. The microfluidic device includes a body defining a channel for accommodating flow of fluid therethrough. A monitor structure is disposed in the channel of the body in the... | 08/07/2007 |
| 7250300 | Method and means for the determination of total acid The invention relates to a dry-chemical method and a test kit for the rapid, quantitative analysis of total acid in wine and must. In this method, a slightly alkaline buffer is added to the sample to be analyzed, and the total acid content is determined from the res... | 07/31/2007 |
| 7247492 | Method for observing chemical substances An apparatus and method for observing a chemical substance. In one embodiment, the apparatus includes a vessel having a base portion and an at least partially transparent wall portion depending from and extending away from the base portion. The base portion and the ... | 07/24/2007 |
| 7247493 | Reusable pH sensor device and related methods The present invention relates to devices, methods, and kits for quickly and easily measuring and monitoring the pH of aquatic environments, such as lakes, streams, drinking waters, fisheries, aquariums, pools, hot-tubs, and spas. The current invention includes devic... | 07/24/2007 |
| 7231806 | Apparatus and method for rapidly, eco-friendly sample preparation prior to chromatographic determination of chemical substances A method and apparatus for rapidly preprocessing and analyzing chemical substances, which places a vaporization bottle containing a sample inside a microwave device and uses a magneton driving device to drive the magneton inside the vaporization bottle to rotate as ... | 06/19/2007 |
| 7198756 | Non-invasive measurement of pH There is a need within the medical community for non-invasive instruments to measure critical physiologic parameters at the point of care. Such a technique may be applicable to a wide variety of commonly monitored physiologic parameters during critical care patient ... | 04/03/2007 |
| 7186373 | Visual detector for vaporized hydrogen peroxide A method and apparatus for sensing the concentration of a gaseous sterilant in a sealable enclosure. An indicator is provided that has a chemistry such that the indicator changes color when exposed to vaporized hydrogen peroxide (VHP). The chemistry is adapted to re... | 03/06/2007 |
| 7160731 | Examination method of buffer capacity of saliva and examination instrument of buffer capacity of saliva To provide a simple examination method of buffer capacity of saliva without influence by examiner's subjectivity and an examination instrument to carry out suitably the examination method, an examination instrument, in which two to ten kinds of chemical liquids each... | 01/09/2007 |
| 7152459 | Apparatus and method for rapidly, eco-friendly sample preparation prior to chromatographic determination of chemical substances This invention discloses a method and an apparatus for rapidly preprocessing and analyzing chemical substances, which places a vaporization bottle containing a sample inside a microwave device and uses a magneton driving device to drive the magneton inside the vapor... | 12/26/2006 |
| 7153695 | Continuous flow titration The present invention relates to a method for titration comprising guiding a sample to be titrated through a conduit, adding a reagent to said conduit at at least two entrance positions along said conduit in such a manner that said reagent will react with the sample... | 12/26/2006 |
| 7141430 | Microrespirometer and associated methods A method for measuring an evolution rate of a gas from a sample includes equilibrating a sample with an alkaline solution and a pH indicator and permitting the alkaline solution to absorb formed carbon dioxide in an enclosed headspace. From the pH indicator at equil... | 11/28/2006 |
| 7135593 | Degradable crosslinkers, and degradable crosslinked hydrogels comprising them One aspect of the present invention relates to base-labile crosslinkers. A second aspect of the present invention relates to degradable crosslinked polymers and hydrogels comprising a base-labile crosslinker. The present invention also relates to a method of influen... | 11/14/2006 |
| 7125580 | Method for preparing a solid phase microextraction device using aerogel A sample collection substrate of aerogel and/or xerogel materials bound to a support structure is used as a solid phase microextraction (SPME) device. The xerogels and aerogels may be organic or inorganic and doped with metals or other compounds to target specific c... | 10/24/2006 |
| 7098034 | Systems and methods for assessing the presence of and/or the level of anti-stripping constituents in asphalt binders or asphalt mixtures Methods, systems, and computer program products analyze asphalt samples for anti-stripping agents by: obtaining a sample comprising asphalt binder material; sensing a selected parameter associated with the sample (such as the acidity and/or alkalinity of the sample)... | 08/29/2006 |
