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Searching: chemistry





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Patent # Description
US-5,547,839 Sequencing of surface immobilized polymers utilizing microflourescence detection
Means for simultaneous parallel sequence analysis of a large number of biological polymer macromolecules. Apparatus and methods may use fluorescent labels in...
US-5,547,716 Laser absorption wave deposition process and apparatus
Laser energy is used to make precursors of crystalline materials, such as diamond, by providing an environment in which optical radiation may be efficiently...
US-5,541,348 Bile acids for biological and chemical applications and processes for the production thereof
Novel bile acids according to the general formula ##STR1## wherein R.sub.1 represents a hydroxyl group, R.sub.2 and R.sub.3 both represent a hydrogen or a...
US-5,541,006 Method of making composite cermet articles and the articles
Methods for making, methods for using and articles comprising ferromagnetic cermets, preferably cemented carbides and more preferably tungsten carbide, having at...
US-5,538,634 Solid phase extraction filtration disk and method for its manufacture
A solid phase extraction (SPE) filtration disk provides a glass fiber disk embedded with bonded silica/particulate chemistries homogeneously dispersed throughout...
US-5,535,744 Method and apparatus for blood chemistry analysis
A blood chemistry analyzer for determining the concentration of various chemical compounds or analytes in a patient's blood in a non-invasive manner employs a...
US-5,535,135 State estimator based exhaust gas chemistry measurement system and method
A system, and a corresponding method, for measuring a chemical concentration of a gas exhausted from exhaust ports (409, 413) of a multi-cylinder internal...
US-5,533,074 Nuclear reactor coolant level monitoring system
A system for determining the level of coolant in a depressurized nuclear reactor comprises a first set of pressure transducers located in the coolant piping and...
US-5,532,130 Methods and compositions for sequence-specific hybridization of RNA by 2'-5' oligonucleotides
(2'-5') linked 3'-Deoxyoligodeoxynucleotides have been synthesized on a solid support via standard cyanoethyl phosphoramidite chemistry. This simple change in...
US-5,527,681 Immobilized molecular synthesis of systematically substituted compounds
A synthetic strategy for the creation of large scale chemical diversity is claimed. Solid-phase chemistry, photolabile protecting groups, and photolithography...
US-5,527,566 Conditioning of a polymeric substrate
A polymeric substrate is exposed to an oxygen containing plasma; and then exposed to a reducing atmosphere at an elevated temperature. The reducing treatment...
US-5,527,399 Magnetic strips and methods for making the same
Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0.005 inches and are made of a ferrous...
US-5,525,514 Wash detection method for dried chemistry test elements
A method for verifying the effectiveness of a washing operation on a clinical dry chemistry slide element in which wash liquid is dispensed onto the surface of...
US-5,525,167 Elevated nitrogen high toughness steel article
A high toughness steel has a composition comprising, by weight, about 0.10% to 1.05% carbon, about 0.00% to 0.05% aluminum, about 0.01% to 0.20% titanium, about...
US-5,524,647 Control of cigarette smoke chemistry
A high level of flavour can be provided in cigarette smoke at a low tar level while providing a more uniform delivery of flavour and tar as the cigarette is...
US-5,523,878 Self-assembled monolayer coating for micro-mechanical devices
A method of forming of a monomolecular coating (19) for surfaces of contacting elements (11, 17) of micro-mechanical devices (10), specifically, devices that...
US-5,522,994 Single column chromatographic determination of small molecules in mixtures with large molecules
A process for separating small molecules from a sample containing small and large molecules using a porous separation medium having bimodal chemistry wherein the...
US-5,516,625 Fill and etchback process using dual photoresist sacrificial layer and two-step etching process for planarizing...
To planarize an oxide-filled shallow trench-isolated semiconductor architecture, a composite photoresist sacrificial layer is initially formed on the...
US-5,515,406 Internal passive catalytic ammonia converter for reduction of main steam dose rate associated with hydrogen...
A passive catalytic ammonia converter operating in the water/steam mixture exiting the core of a boiling water reactor. The catalytic ammonia converter is made...
US-5,514,337 Chemical sensor using eddy current or resonant electromagnetic circuit detection
An instrument is applied to the measurement of chemical species and concentration through the use of a chemically-sensitive coating on the eddy current coil or...
US-5,512,492 Waveguide immunosensor with coating chemistry providing enhanced sensitivity
Methods and apparatus for evanescent light fluoroimmunoassays are disclosed. The apparatus employs a planar waveguide and optionally has multi-well features and...
US-5,512,130 Method and apparatus of etching a clean trench in a semiconductor material
An etching apparatus (10) includes a process chamber (12) partially surrounded by an upper electrode (14) and a lower electrode (16). A semiconductor material...
US-5,510,213 Method of preparing electrodes for lead-acid electrode battery
The invention provides an electrode for a lead-acid battery, formed in an essentially continuous process without the need for curing under controlled temperature...
US-5,506,220 Anti-glaucomatous pharmaceutical composition and the process for obtaining them
The invention relates to the domain of medicinal chemistry. It concerns more particularly that of the preparation of pharmaceutical compositions for ocular...
US-5,505,987 Processes for improving the bond between hydrating cement-based materials and existing cement-based substrates
Cement compositions and processes for improving the bond between new hydrating cement-based materials and the surface of "old" cement-based substrates are...
US-5,505,828 Calibration solutions useful for analysis of biological fluids and methods employing same
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO.sub.2, and optionally, for concurrent...
US-5,504,411 Battery charger contact protection circuit
A battery charger contact protection circuit (10) including a metal oxide field effect transistor (16) is provided. The battery charger contact protection...
US-5,502,236 Method for the production of (3-alkoxycarbonyl-2-butenyl)triphenylphosphonium salts
Novel processes and intermediates useful for the manufacture of the Wittig ester salts are disclosed. The Wittig ester salts are known as important CS building...
US-5,502,226 Process of preparing .omega.-hydroxy acids
A new synthesis of .omega.-hydroxy acids, which employs commercially available starting materials and lowers the cost of production. The process involves...
US-5,502,025 Safening herbicidal pyrazolylsulfonylureas
The disclosure herein relates to the safening of crops from injury by herbicidal pyrazolosulfonylureas alone or combined with co-herbicides from various classes...
US-5,494,590 Method of using anticoagulant solution in blood separation
An anticoagulant solution of sodium citrate for use in blood chemistry-related techniques and apparatus is disclosed. The anticoagulant solution should include...
US-5,494,258 Valve
A valve for regulating the flow of a liquid, for example in liquid chromatography, comprises a valve seat and a valve ball which are made of electrically...
US-5,492,597 Method of etching WSi.sub.x films
The present invention teaches a method for etching a tungsten silicide (WSi.sub.x) film overlying a polysilicon film in an enclosed chamber during a...
US-5,489,678 Photolabile nucleoside and peptide protecting groups
A synthetic strategy for the creation of large scale chemical diversity. Solid-phase chemistry, photolabile protecting groups, and photolithography are used to...
US-5,487,954 Non-acicular modified high coercivity iron oxides for high density magnetic recording and the processes of...
The non-acicular modified maghemite and magnetite have high coercivity of, for the maghemite, up to 2200 Oe, saturation and residual magnetization of 63-85 emu/g...
US-5,486,112 Autonomous wearable computing device and method of artistic expression using same
Educational devices using process-oriented educational methods are disclosed to prepare pre-school children, school children, and teenagers for keyboarding. The...
US-5,482,608 Capillary electrophoresis flow control system
A system for controlling the bulk flow rate in capillary electrophoresis employs pressure to increase velocity without unacceptably increasing plate height....
US-5,476,924 Protecting group for acetals and methods of using the same in the activation of saccharides
The present invention relates to a method of protecting the hemiacetal or acetal group at the anomeric carbon of a saccharide molecule comprising forming a...
US-RE35,127 Non-halogenated insulation with high oxygen index
The invention features in synergistic combination a new chemistry for fabricating wire and cable insulation and heat-shrinkable tubing and an irradiation process...
US-5,475,800 Color separation in color graphics printing with limited memory
In liquid-ink color graphics printing, true black ink is preferred over composite black wherever possible, but poor print quality results from printing black ink...
US-5,475,461 Photographic processing apparatus
A photographic processing apparatus which incorporates a drum arrangement to form a low volume processing tank. The arrangement comprises a processing tank in...
US-5,475,048 Conductor-filled thermosetting resin
Conductor-filled thermosetting resins having a free radical based cure chemistry are prepared for use as solder paste replacements for electrical conducting...
US-5,470,772 Silicidation method for contactless EPROM related devices
A process for fabricating contactless electrically programmable and electrically erasable memory cells of the flash contactless EPROM or EEPROM type. The array...
US-5,470,693 Method of forming patterned polyimide films
A method of producing patterned polyimide films using wet development of polyimide precursors through a photoresist mask is disclosed. Low thermal coefficient of...
US-5,468,955 Neutral beam apparatus for in-situ production of reactants and kinetic energy transfer
The discovery that a location exists in a plasma sheath surrounding a plasma near a plasma confining surface where recombination of ions and electrons is favored...
US-5,467,883 Active neural network control of wafer attributes in a plasma etch process
The present invention is predicated upon the fact that an emission trace from a plasma glow used in fabricating integrated circuits contains information about...
US-5,466,344 Method and apparatus for controlling water-based liquid waste
A pollution control apparatus (10) for controlling water-based liquid waste includes a vacuum distillation vessel (14) for separating water-based liquid waste...
US-5,465,279 Reactor coolant pump seal test decontamination housing
An arrangement of reactor coolant pump seals arranged in a generally annular stack with a plurality of stacking spacers in a test housing for emplacement in a...
US-5,465,151 Sensors employing interference of electromagnetic waves passing through waveguides having functionalized surfaces
Chemical and biosensors are disclosed. An optical waveguide is used to conduct electromagnetic radiation by total internal reflection in parallel through a...
US-5,464,850 Synergistic preservative systems for chemistry reagents
A family of solutions that can be used to calibrate one or more electrochemical sensors has been developed. These systems can be used to determine analytes in...
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