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Searching: chemistry





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Patent # Description
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...
US-5,628,960 Composite cellulose nitrate membrane on polyester support
There is disclosed a composite isotropic cellulose nitrate membrane on a polyester support and a method of making the same, the membrane having particular...
US-5,625,656 Method for monitoring noble metal distribution in reactor circuit during plant application
A method for ensuring the distribution of noble metal in the reactor circuit during plant application without measuring the reactor water for noble metal content...
US-5,624,638 Modular laboratory equipment and coupling system
A personal, miniaturized, multipurpose test kit for performing a plurality of chemical tests and procedures, which include interchangeable multifunctional...
US-5,623,196 Apparatus and method of simulating high battery temperature in a rechargeable battery
A device (111) for simulating a high battery temperature used in charging a rechargeable cell (101). The device takes advantage of a control signal generated by...
US-5,623,109 Plant monitoring and diagnosing method and system, as well as plant equipped with the system
Plant operating conditions 1, apparatus operating conditions 2 and environment conditions 3 are accumulated, combined and put together as a set of plant status...
US-5,622,974 .alpha.-substituted-3-benzyl-benzofurans
This invention relates to the fields of pharmaceutical and organic chemistry and provides novel 3-benzyl-benzofurans which are .alpha.-substituted with ether,...
US-5,621,180 Capillary sampling flow controller
A capillary sampling flow controller provides an improvement in the process of sampling or monitoring for the analysis of air and gas chemistries; a constant...
US-5,620,615 Method of etching or removing W and WSi.sub.x films
The present invention teaches a method for etching or removing a tungsten (W) film and a tungsten silicide (WSi.sub.x) film during a semiconductor fabrication...
US-5,618,513 Method for preparing radiolabeled peptides
A method for radiolabelling peptides using polyaminocarboxylate ligands having suitable protecting groups such that they can be added to peptides by standard...
US-5,616,316 Dentifrice-compatible silica particulates
Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment,...
US-5,616,235 Electrochemical stabilization of soils and other porous media
Suitable electrolyte conditioning at the electrodes greatly facilitates the transport of desired ions through soil, enhancing the ability of electrokinetic...
US-5,614,177 Dentifrice-compatible silica particulates
Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment,...
US-5,614,176 Dentifrice-compatible silica particulates
Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment,...
US-5,612,020 Dentifrice-compatible silica particulates
Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment,...
US-5,610,017 Method for conducting a polymerase chain reaction using an improved electrochemiluminescent label
This invention relates to a new electrochemiluminescent (ECL) label for oligonucleotides using phosphoramidite chemistry.
US-5,609,775 Dry etch process for titanium-tungsten films
A method for dry etching a composite metal film, consisting of an aluminum overlay film, a titanium--tungsten film, and a titanium underlay film, is described....
US-5,604,242 Heterocyclic chemistry
The present invention relates to therapeutically active azaheterocyclic compounds, a method of preparing the same and to pharmaceutical compositions comprising...
US-5,603,351 Method and system for inhibiting cross-contamination in fluids of combinatorial chemistry device
A system and method for accomplishing a plurality of combinatorial processes in parallel comprising a microelectronic and fluidic array (device array) having...
US-5,601,991 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-5,599,695 Printing molecular library arrays using deprotection agents solely in the vapor phase
A method and apparatus for selectively applying a print material onto a substrate for the synthesis of an array of oligonucleotides at selected regions of a...
US-5,597,983 Process of removing polymers in semiconductor vias
A method for forming a contact via in an integrated circuit includes the formation of an aluminum conductive element on an integrated circuit device. A conformal...
US-5,597,910 Electrochemiluminescent label for DNA probe assays
This invention relates to a new electrochemiluminescent (ECL) label for oligonucleotides using phosphoramidite chemistry.
US-5,597,868 Polymeric anti-reflective compounds
Anti-reflective coatings and methods for forming these anti-reflective coatings are disclosed that have a polymer chemistry and optical characteristics suitable...
US-5,597,532 Apparatus for determining substances contained in a body fluid
An apparatus for the optoelectronic evaluation of test paper strips for use in the detection of certain analytes in blood or other body fluids. The test strip...
US-5,596,207 Apparatus and method for detecting defects in insulative layers of MOS active devices
A technique for quantifying the effect of plasma/etching during the formation of MOS transistors avoids the problems of prior techniques. A modified MOS...
US-5,593,795 Polymer electrolyte composition based upon thiol-ene chemistry
Electrolyte compositions in which a salt is disposed in a thiol-ene matrix. The compositions retain their shape under operating conditions and exhibit an ionic...
US-5,590,052 Error checking in blood analyzer
The present invention provides various methods for detecting errors in a blood analysis system. The system includes a blood analyzer and a molded plastic rotor...
US-5,589,348 In situ nicotinamide coenzyme generating system for enzyme based clinical chemistry assays
The invention relates to an improved enzymatic method for determining the concentration of an analyte in a sample body fluid. The improvement comprises a coupled...
US-D376,651 Semi-automated urine chemistry instrument
US-5,582,955 Chemical functionalization of surfaces
Methods for covalently modifying surfaces of various substrates are disclosed, along with various substrates having surfaces modified by such methods. Candidate...
US-5,582,679 Enhanced metal etch process
A method for dry etching metal films, specifically aluminum, is described. This process uses photoresist as a mask with a gas mixture of BCl3, Cl2 and N2 used...
US-5,580,854 Substrate-related peptidyl-aldehyde inhibitors of the proteolytic activity of the multicatalytic proteinase complex
The present invention provides novel peptidylaldehyde inhibitors of proteolysis mediated by the multicatalytic proteinase complex (MPC) or proteasome. The...
US-5,580,794 Disposable electronic assay device
A disposable electronic assay device comprising card-like housing containing a sample receptor for receiving a sample of body fluid containing an analyte to be...
US-5,580,697 Chemical functionalization of surfaces
Methods for covalently modifying surfaces of various substrates are disclosed, along with various substrates having surfaces modified by such methods. Candidate...
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