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Searching: chemistry





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Patent # Description
US-5,700,726 Multi-layered tungsten depositions for contact hole filling
A process for filling small diameter contact holes, with tungsten, has been developed. This process consists of using two consecutive tungsten depositions. A...
US-5,699,157 Fourier detection of species migrating in a microchannel
The present invention provides a microfluidic system for fast, accurate and low cost electrophoretic analysis of materials in the fields of chemistry, ...
US-5,698,722 Functionalization of polymers based on Koch chemistry and derivatives thereof
A Koch functionalized product which is the reaction product of at least one polymer having a number average molecular weight of at least 500 and at least...
US-5,697,046 Composite cermet articles and method of making
Methods for making, methods for using and articles comprising ferromagnetic cermets, preferably cemented carbides and more preferably tungsten carbide, having at...
US-5,697,042 Composite cermet articles and method of making
Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two...
US-5,696,064 Functionalization of polymers based on Koch chemistry and derivatives thereof
A Koch functionalized product which is the reaction product of at least one polymer having a number average molecular weight of at least 500 and at least one...
US-5,691,486 Apparatus and methods for selecting a variable number of test sample aliquots to mix with respective reagents
A method and apparatus for selecting a subset of a predetermined number of test sample aliquots to mix with respective reagents using a shear valve having a...
US-5,691,465 Multi-plate thin film carbon monoxide sensor
A gas detector, preferably for carbon monoxide detection, which includes a light detector(5), a light source (1) for providing a light beam which travels along a...
US-5,686,244 Method for detecting a nucleic acid analyte using an improved electrochemiluminescent label
This invention relates to a new electrochemiluminescent (ECL) label for oligonucleotides using phosphoramidite chemistry.
US-5,686,119 Composite cermet articles and method of making
Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two...
US-5,684,387 Voltage cutoff compensation method for a battery in a charger
A battery charging system (300) is capable of maintaining a fully charged battery (304) without overcharging or undercharging the battery regardless of the...
US-5,681,977 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 C.sub.5...
US-5,679,445 Composite cermet articles and method of making
Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two...
US-5,677,231 Method for providing trench isolation
A trench isolation region (32) is fabricated to include a trench liner (28) comprised of aluminum nitride. The aluminum nitride trench liner is useful in...
US-5,677,133 Dry chemistry cascade immunoassay and affinity assay
A method is described for performing an affinity assay comprising contacting a sample to be assayed for the presence of an analyte with a dry reagent containing...
US-5,677,042 Composite cermet articles and method of making
Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two...
US-5,670,495 Method of pretreating an animal with a corticosteroid prior to infusion of a perfluorochemical emulsion
This invention is directed to a method of attenuating or preventing the adverse side-effects of a perfluorochemical (PFC) emulsion on the hemostatic system and...
US-5,670,329 Method and analytical system for performing fibrinogen assays accurately, rapidly and simply using a rotating...
A method of performing a quantitative fibrinogen assay is provided which uses a dry reagent chemistry in combination with a rotational magnetic field and which...
US-5,669,029 Photographic processing
A method of controlling the replenishment of a processing solution used for processing a photographic material in photographic processing apparatus, wherein...
US-5,667,963 Anticoagulant solution for use in blood chemistry-related techniques and apparatus
An anticoagulant solution of sodium citrate for use in blood chemistry-related techniques and apparatus is disclosed. The anticoagulant solution should include...
US-5,666,006 Circuit offering sequential discharge and simultaneous charge for a multiple battery system and method for...
A circuit enabling simultaneous independent charging, sequential charging and sequential discharging of multiple batteries within a computer system and a method...
US-5,665,620 Method for forming concurrent top oxides using reoxidized silicon in an EPROM
A stack of oxide (16) and silicon nitride (18) is grown/deposited over a patterned polysilicon line, which typically acts as a bottom capacitor plate. A thin...
US-5,660,991 Long lifetime anisotropy (polarization) probes for clinical chemistry, immunoassays, affinity assays and...
A method of conducting an immunoassay of a sample of interest is described, including the steps of (A) coupling a luminescent asymmetric metal-ligand complex to...
US-5,660,600 Batteries and materials useful therein
Batteries based on lead chemistry, e.g., lead-acid batteries, are substantially improved through the use of a particular positive material. This material is...
US-5,658,801 Medical test kit
A medical diagnostic test kit includes a rectangular flat bottom member having an external raised flange and an internal raised flange forming a cavity therein;...
US-5,656,241 Method for manufacturing fiber optic sensors
A method is provided-for manufacturing a fiber optic sensor for detecting or measuring a parameter of interest in a sample fluid, including pH, concentration of...
US-5,656,102 Bake hardenable vanadium containing steel and method thereof
Rolled articles such as hot rolled or cold rolled and annealed sheet and/or strip include effective amounts of vanadium in low carbon steels to produce an...
US-5,653,894 Active neural network determination of endpoint in a plasma etch process
The present invention is predicated upon the fact that a process signature from a plasma process used in fabricating integrated circuits contains information...
US-5,653,824 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-5,652,176 Method for providing trench isolation and borderless contact
A trench isolation region (32) is fabricated to include a trench liner (28) comprised of aluminum nitride. The aluminum nitride trench liner is useful in...
US-5,652,170 Method for etching sloped contact openings in polysilicon
Disclosed is a vertically oriented capacitor structure, which is of particular usefulness in MOS DRAM memory modules. The structure has upper and lower...
US-5,648,537 Process for the synthesis of substituted carbodiimides
The invention relates to a new process for the synthesis of a disubstituted carbodiimide, including a first stage of phosgenation of an N,N'-disubstituted urea...
US-5,648,201 Efficient chemistry for selective modification and metallization of substrates
A process for efficient modification and metallization of substrates includes the steps of providing a substrate with highly photoefficient chemical functional...
US-5,646,285 Combinatorial non-peptide libraries
The present invention relates to an orthogonally-protected compound of the formula: ##STR1## wherein PG.sub.1 is a first protecting group that is unreactive...
US-5,644,153 Method for etching nitride features in integrated circuit construction
A process for etching nitride layers in three steps is disclosed. The process comprises selecting a process chemistry of CF.sub.4 to CHF.sub.3 to set a...
US-5,643,989 Fiber reinforced functionalized polyolefin composites
A composite material consisting of continuous random glass mats with a new non-peroxide sizing chemistry, polypropylene and a functionalized polypropylene. This...
US-5,643,884 Lupane triterpenoid derivatives
This invention relates generally to the field of medicinal chemistry, and more specifically to derivatives of a subclass of triterpenoid acids that have...
US-5,643,631 Ink jet recording paper incorporating novel precipitated calcium carbonate pigment
An improved thermal ink jet recording paper, incorporating heat aged precipitated calcium carbonate ("PCC") and a binder, is disclosed. Heat aging the PCC in the...
US-5,641,920 Powder and binder systems for use in powder molding
Provided is a powder and binder system for manufacturing sintered parts from particulate material, and a method of injection molding parts for sintering. The...
US-5,639,345 Two step etch back process having a convex and concave etch profile for improved etch uniformity across a substrate
A novel method for improving the etch back uniformity for inter-metal-dielectric planarization was accomplished. Conventional single etch backs use a high...
US-5,637,684 Phosphoramidate and phosphorothioamidate oligomeric compounds
Compounds are provided having the structure: ##STR1## wherein the L groups are spanner or linker units, the Y and T group are functional groups for...
US-5,635,969 Method and apparatus for the application of multipart ink-jet ink chemistry
A multi-color ink-jet printing system includes a printing element for applying a precisely metered quantity of a colorless precursor in a binary or ternary...
US-5,634,461 System for measuring blood oxygen levels
A system and software is described for calculating, in real-time, the mixed venous partial pressure of oxygen in a patient. The system uses a computer, an...
US-5,632,904 Water disinfection method using metal-ligand complexes
Metal-ligand complexes produced by coordination chemistry for use as a biocide and a method for detoxifying water or effluent are disclosed. Metallic biocides...
US-5,631,398 Method for the production of (3-alkoxycarbonyl-2-butenyl) triphenylphosphonium salts
A processes and intermediates useful for the manufacture of the Wittig ester salts are disclosed. The Wittig ester salts are known as important C.sub.5 building...
US-5,631,322 Polymers of N-acryloylmorpholine activated at one end and conjugates with bioactive materials and surfaces
Polymers of the monomer N-acryloylmorpholine having a single reactive moiety at one end of the polymer chain have the following structure: ##STR1## wherein...
US-5,631,167 Capsule chemistry analytical methods employing dioxetane chemiluminescence
Improved assay methods utilizing stable, enzymatically triggered chemiluminescent 1,2-dioxetanes with improved water solubility are provided. Assays are...
US-5,631,121 Photographic processing
It is important to control the temperature during the development stage of a photographic process in order to maximize the efficiency thereof. This is a...
US-5,629,434 Functionalization of polymers based on Koch chemistry and derivatives thereof
A Koch functionalized product which is the reaction product of at least one polymer having a number average molecular weight of at least 500 and at least one...
US-5,629,384 Polymers of N-acryloylmorpholine activated at one end and conjugates with bioactive materials and surfaces
Polymers of the monomer N-acryloylmorpholine having a single reactive moiety at one end of the polymer chain have the following structure: ##STR1## wherein...
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