Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7651860 | Method of analyzing low levels of peroxyacetic acid in water Methods of analyzing low levels of peroxyacetic acid (PAA) in water are described. These methods employ buffering the PAA-containing water and the use of a N,N-diethyl-p-phenylenediamine (DPD) indicator system in the presence of iodide ion. The intensity of the pink... | 01/26/2010 |
| 7427507 | Determination of antibiotic concentration in bone A method of determining the concentration of antibiotic in bone comprising crushing the bone, adding a stabilizing agent to the bone, homogenizing the bone in an extraction solvent to obtain a homogenous suspension, and analyzing the suspension supernatant to determ... | 09/23/2008 |
| 7390669 | Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In ... | 06/24/2008 |
| 7381567 | Dissociative fluorescence enhancement assay The invention relates to an enhancement solution for an assay technology using lanthanide ions or their chelates as labels and dissociative fluorescence enhancement as a tool for detection, wherein said enhancement solution comprises a β-diketone of formula I | 06/03/2008 |
| 7329308 | Air handling and chemical filtration system and method The present invention relates to systems and methods for controlling humidity and temperature in gases or air streams used in semiconductor processing systems. These systems and methods can be used in combination with systems and methods for contaminant detection an... | 02/12/2008 |
| 7322243 | Acoustic wave etch rate sensor system An acoustic wave sensor system for monitoring the etch rate or etch ability of a selective material has an acoustic wave sensing device having a piezoelectric substrate and at least one electrode coupled to the substrate for generating a propagating acoustic wave an... | 01/29/2008 |
| 7288228 | Sample injection system An HPLC injection valve is mounted to a probe drive system close to the probe axis to minimize probe movements required for sample injections into a mobile phase column. The probe is directly connected by a short conduit to the injection valve, eliminating the need ... | 10/30/2007 |
| 7273588 | Methods of sampling halosilanes for metal analytes Methods for determining the amount of at least one metal analyte present in a liquid or gas sample of a halosilane supply (e.g., a chlorosilane supply) are disclosed herein. A sample of a halosilane supply is contacted and reacted with an aqueous hydrofluoric acid s... | 09/25/2007 |
| 7235214 | System and method for measuring molecular analytes in a measurement fluid A molecular contamination monitoring system includes a piezoelectric measurement sensor exposed to a molecular constituent to be measured; a piezoelectric reference sensor; and a filter for filtering said molecular constituent, the filter located between the referen... | 06/26/2007 |
| 7232545 | Sensor for determining concentration of fluid sterilant A sensor for detecting hydrogen peroxide, comprising an element exhibiting piezoelectric properties having a metal-oxide-containing coating, the metal-oxide having a divalent or tetravalent state. ... | 06/19/2007 |
| 7198955 | Method and apparatus for measurement of blood substitutes A method is disclosed whereby the concentration of a blood substitute, such as cross-linked hemoglobin, in a serum or plasma specimen is rapidly and accurately identified and quantified. The method further takes the measured concentration of the blood substitute and... | 04/03/2007 |
| 7185969 | Droplet dispensation from a reservoir with reduction in uncontrolled electrostatic charge Devices and methods are provided for reducing the uncontrolled electrostatic charges that can alter the volume and/or trajectory of a droplet, which is typically ejected through the application of focused acoustic radiation. Also provided are reservoirs and substrat... | 03/06/2007 |
| 7183117 | Apparatus for measuring characteristics of chemical solution, chemical solution supply apparatus, and method for measuring concentration of chemical solution A supply apparatus for preparing a mixed chemical solution of a predetermined mixing ratio at a low cost and for supplying the mixed chemical solution stably. The supply apparatus includes a measuring apparatus located on an intermediate portion of a flow channel th... | 02/27/2007 |
| 7166470 | Formation of combinatorial arrays of materials using solution-based methodologies A combinatorial method for discovering or optimizing materials is disclosed. The method uses solution-based components that are mixed and dispensed into regions on a substrate for drying and/or heat-treating. The drying and/or heat-treating produces materials that c... | 01/23/2007 |
| 7125521 | Method to solve alignment mark blinded issues and technology for application of semiconductor etching at a tiny area A method of unblinding an alignment mark comprising the following steps. A substrate having a cell area and an alignment mark within an alignment area is provided. An STI trench is formed into the substrate within the cell area. A silicon oxide layer is formed over ... | 10/24/2006 |
| 7092077 | System and method for monitoring contamination The present invention provides passive sampling systems and methods for monitoring contaminants in a semiconductor processing system. In one embodiment, that passive sampling system comprises a collection device in fluid communication with a sample line that provide... | 08/15/2006 |
| 7022164 | Filters employing porous strongly acidic polymers A clean, high efficiency, low pressure drop, adsorptive filter material that is porous and includes an acidic functional group. The filter can include, for example, a non-woven filter composite has a porous sulfonated divinyl benzene styrene copolymer beads having s... | 04/04/2006 |
| 7001522 | Systems for column-based separations, methods of forming packed columns, and methods of purifying sample components The invention encompasses systems for column-based separations, methods of packing and unpacking columns and methods of separating components of samples. In one aspect, the invention includes a method of packing and unpacking a column chamber, comprising: a) packing... | 02/21/2006 |
| 6991937 | Urine cystine quantitation and supersaturation assay A method for measuring cystine supersaturation of a patient urine sample as an indicator of the patient's risk for cystine stone formation has been found. A method for collecting a patient urine sample for assessment of cystine concentration and cystine supersaturat... | 01/31/2006 |
| 6947138 | Optical sensor system and method for detection of hydrides and acid gases A gas sensor for detection of hydride and/or acid gas species, featuring a color changing material that changes color in exposure to hydride and/or acid gas species, component(s) for impinging radiation on the color changing material for reflection therefrom, and co... | 09/20/2005 |
| 6945090 | Method and apparatus for monitoring molecular contamination of critical surfaces using coated SAWS A molecular contamination monitor for monitoring molecular contamination on a surface of a subject surface susceptible to degradation by a molecular contaminant. The monitor includes a surface acoustic wave (SAW) device having a SAW measurement surface coated with a... | 09/20/2005 |
| 6902937 | Method for the determination of low-concentration anions in the presence of an excess of another anion This invention relates to methods and apparatus for detecting, quantifying, and/or identifying trace quantities of an anion in the presence of an excess of another anion. One apparatus comprises a sample loop having a first end adapted to be connected to a sample-in... | 06/07/2005 |
| 6767746 | Method and apparatus for analyzing acid gas loading within an amine solution Method and apparatus used to calculate the hydrogen sulfide and carbon dioxide loading of both rich and lean amine solutions used to remove acidic gas components from sour or production gases in order to produce a sweet or sales gas for transmission purposes. The am... | 07/27/2004 |
| 6743636 | Microfluid driving device A microfluid driving device is provided. The microfluid driving device of this invention comprises microfluid driving platform prepared in a chip, which platform comprises at least two miniature Venturi pumps, at least one microchannel and optionally micro mixers or... | 06/01/2004 |
| 6730521 | Chemical and biochemical assay method and apparatus A chemical and bio-chemical assay method is described which screens compounds for enzyme inhibition, or receptor or other target binding. Inhibition or binding by the library compounds causes a change in the amount of an optically detectable label that is bound to s... | 05/04/2004 |
| 6488896 | Microfluidic analysis cartridge A device for analyzing sample solutions such as whole blood based on coagulation and agglutination which requires no external power source or moving parts to perform the analysis. Single disposable cartridges for performing blood typing assays can be cons... | 12/03/2002 |
| 6479018 | Detection of a gaseous substance emanating from a layer of polymeric composition Detection of an evolving or diffusing gaseous substance emanating from an irradiated or thermolyzed layer of polymeric composition in semiconductor processing or similar processes is disclosed. The evolving or diffusing gaseous substance is detected by sp... | 11/12/2002 |
| 6337211 | System and a method for detecting antifreezing substances in a hermetic compressor The invention relates to a system and a method for detecting antifreezing substances in a hermetic compressor.... | 01/08/2002 |
| 6228651 | Preparation of analytical samples, analysis of impurities, preparation of highly purified phosphoric acid and production of semiconductor devices A process for the preparation of an analytical sample characterized by depositing and separating solely the impurity to be analyzed from phosphoric acid; a process for analysis of the impurity characterized by depositing and separating solely the impurity... | 05/08/2001 |
| 6228650 | Acid catalyst regeneration control In an HF alkylation process where an acid catalyst regeneration column separates HF acid from ASO and water to provide regenerated catalyst for a catalyst circulation stream, and where buildup of ASO in the catalyst circulation stream is encountered, an i... | 05/08/2001 |
| 6187596 | Airborne contaminant indicator An indicator system provides a visual indication of the cumulative level of an airborne contaminant. The indicator is a transparent sheath with support medium having an acidic surface and treated with a color pH indicator. As a basic contaminant is adsorb... | 02/13/2001 |
| 6177279 | Ion extraction process for single side wafers A process for extracting inorganic ionic contaminants from a front surface of a silicon wafer for chemical analysis. The wafer is placed in a container upon a support which holds the wafer in a generally level orientation and isolates the wafer to inhibit... | 01/23/2001 |
| 6174731 | Reagent for the PH-metric determination of low acid numbers in petroleum oils A reagent for pH-metric acid number determination in a petroleum oil with low acid numbers (ANࣘ0.03 mg KOH/g oil) includes a salt of a strong base and a weak acid, and, an alkali in a mixture of water and an alcohol. The salt of a strong base and a weak... | 01/16/2001 |
| 6117686 | Method for detecting harmful gases which is applicable to broad gas concentration range The present invention provides a method by which harmful trace gases in a gaseous mixture containing as such harmful halogen gases, halogenated hydrogen gases, acid gases, oxidizing gases, basic gases, organic acid gases, especially halogen gases or halog... | 09/12/2000 |
| 6103487 | Method of treating cancer The instant invention provides for a method of inhibiting prenyl-protein transferases and treating cancer which comprises administering to a mammal a prenyl-protein transferase inhibitor which is efficacious in vivo as an inhibitor of geranylgeranyl-prote... | 08/15/2000 |
| 6096557 | Gas detection method and apparatus using gas reactive pigment This invention provides a method for determining the concentration of a gas to be detected by a gas detector using a gas reactive pigment, wherein the dynamic range of the detectable concentration can be controlled. The method comprising bringing a gas to... | 08/01/2000 |
| 5994147 | System and method for determining acid-gas (CO2, H2 S) loadings in an alkanolamine system A method for determining the concentration of acid-gases in an amine-regeneration system, such as is typically found in a natural gas refining plant, having a device for measuring the pH of the system from which the concentration of the acid-gases complex... | 11/30/1999 |
| 5976467 | Airborne contaminant indicator An indicator system provides a visual indication of the cumulative level of an airborne contaminant. An indicator has a transparent sheath with support medium treated with acid and a pH indicator, as the contaminant is adsorbed, the color changes along th... | 11/02/1999 |
| 5952237 | Method for detecting harmful gases which is applicable to broad gas concentration range The present invention provides a method by which harmful trace gases in a gaseous mixture containing as such harmful halogen gases, halogenated hydrogen gases, acid gases, oxidizing gases, basic gases, organic acid gases, especially halogen gases or halog... | 09/14/1999 |
| 5922609 | Method for infrared-optical determination of the concentration of at least one chemical analyte in a liquid sample In a method for infrared-optical determination of the concentration of at least one chemical analyte in a liquid sample, where the liquid sample is passed through a measuring cell and irradiated with infrared radiation of a single narrow waverange and inf... | 07/13/1999 |
