Patents by Inventor Harden M. McConnell
Harden M. McConnell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5501956Abstract: Enzyme or substrate determinations can be achieved by employing an organic second substrate, which produces a product which may be coupled with a metal inorganic redox couple capable of interacting with and affecting the potential of a metal electrode on a semiconductor surface. Particularly, hydrogen peroxide or indoxyl phosphate are coupled with iron- or ruthenium-containing ionic redox couples for determination with a noble metal electrode.Type: GrantFiled: January 24, 1994Date of Patent: March 26, 1996Assignee: Molecular Devices CorporationInventors: Henry G. Wada, Harden M. McConnell, Dean G. Hafeman
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Patent number: 5500188Abstract: Photoresponsive devices including a photoresponsive electrode are provided, and methods for their use to measure changes in environment at a site at or about the surface of the photoresponsive device. By employing a source of light for irradiating a site on the surface and means for biasing the photoresponsive electrode in relation to a counterelectrode, a variation in electrical signal can be related to a change in a medium in photoresponsive modulation relationship to the photoresponsive electrode surface.Type: GrantFiled: January 24, 1994Date of Patent: March 19, 1996Assignee: Molecular Devices CorporationInventors: Dean G. Hafeman, John W. Parce, Harden M. McConnell
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Patent number: 5496697Abstract: Methods and apparatus are disclosed for detecting the effects of cell affecting agents on living cells. The method steps include providing living cells that are retained in a micro flow chamber. The micro flow chamber is adapted for either continuous or intermittent flow of solutions or suspensions in intimate contact with the cells. The solutions or suspensions, which contain a cell affecting agent, are then flowed in intimate contact with the cells and the pit is measured.Type: GrantFiled: September 8, 1993Date of Patent: March 5, 1996Assignee: Molecular Devices CorporationInventors: John W. Parce, Harden M. McConnell, Gillian M. K. Humphries, Karen M. Kercso, John C. Owicki, Josef E. Kercso
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Patent number: 5364762Abstract: Processes for increasing antigen binding capacity of a major histocompatibility complex (MHC) molecule or a chain thereof are described. Such processes comprise treating an antigen-bound MHC molecule or a chain thereof with an effective amount of an unfolding agent to release undesired antigen from the MHC molecule or chain and then treating the antigen-free MHC molecule or chain with an effective amount of a refolding agent to produce a functional MHC molecule or chain. Additionally, compositions of MHC molecules that are substantially free of undesired antigens or that have been bound with desired specific antigens, alone or in combination with pharmaceutically acceptable carriers and/or cytotoxic agents, are described. The present invention has utility for therapeutic administrations, drug screening, and diagnostics.Type: GrantFiled: March 21, 1990Date of Patent: November 15, 1994Assignee: Board of Trustees of the Leland Stanford Junior UniversityInventors: Klaus Dornmair, Harden M. McConnell
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Patent number: 5278048Abstract: Methods are disclosed for detecting the effects of cell affecting agents on living cells. The method steps include providing living cells that are retained in a micro flow chamber. The micro flow chamber is adapted for either continuous or intermittent flow of solutions or suspensions in intimate contact with the cells. The solutions or suspensions, which contain a cell affecting agent, are then flowed in intimate contact with the cells and at least one effect of the cell affecting agent on the cells is measured by an appropriate detecting means, which is operatively associated with the micro flow chamber.Type: GrantFiled: May 29, 1991Date of Patent: January 11, 1994Assignee: Molecular Devices CorporationInventors: John W. Parce, Harden M. McConnell, Gillian M. K. Humphries, Karen M. Kercso, John C. Owicki, Josef E. Kercso
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Patent number: 5164319Abstract: Apparatus and methods are provided for multiple detection of analytes employing semiconductor capacitance as the signal modulated by the analyte. A plurality of semiconductor capacitors are organized for detection (at individual sites) of changes in capacitance which are related to changes in a fluid medium, where the change can be related to the presence of an analyte. Circuitry is designed to substantially maximize sensitivity.Type: GrantFiled: November 17, 1989Date of Patent: November 17, 1992Assignee: Molecular Devices CorporationInventors: Dean G. Hafeman, Harden M. McConnell
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Patent number: 4883579Abstract: Devices and methods are provided for making a plurality of determinations of the local (site-specific) redox state of a liquid system, by employing a photoresponsive element, which can be independently irradiated at different sites to provide independently detectable signals.Type: GrantFiled: April 1, 1987Date of Patent: November 28, 1989Assignee: Molecular Devices CorporationInventors: Gillian M. K. Humphries, John W. Parce, Harden M. McConnell
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Patent number: 4849330Abstract: Devices and methods are provided for making a plurality of determinations of the local (site-specific) redox state of a liquid system, by employing a photoresponsive element, which can be independently irradiated at different sites to provide independently detectable signals.Type: GrantFiled: May 3, 1985Date of Patent: July 18, 1989Assignee: Molecular Devices CorporationInventors: Gillian M. K. Humphries, John W. Parce, Harden M. McConnell
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Patent number: 4737464Abstract: An apparatus for determining a characteristic of a signal modulating component related to an analyte of interest at an assay site by measuring light modulated by the component. A light source uniformly illuminates the assay site and a reference site. The light is directed from the sites onto a group of memory cells on the surface of a random access memory. The memory cells will decay from a logical 1 to a logical 0 due to the light over a period of time which is a function of the intensity of the light and the reference voltage of the memory cells marking the difference between a 1 and a 0. The digital state of each of the memory cells in the group is measured a predetermined exposure time. The measured states of a group of memory cells corresponding to the assay site are compared to the memory cell states for a reference group. The measured states are then analyzed to determine a characteristic of the analyte.Type: GrantFiled: September 26, 1985Date of Patent: April 12, 1988Assignee: Molecular Devices CorporationInventors: Harden M. McConnell, Jonathan Briggs, John W. Parce
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Patent number: 4704353Abstract: Devices and methods are provided for making a plurality of determinations of the local (site-specific) redox state of a liquid system, by employing a photoresponsive element, which can be independently irradiated at different sites to provide independently detectable signals.Type: GrantFiled: April 27, 1984Date of Patent: November 3, 1987Assignee: Molecular Devices CorporationInventors: Gillian M. K. Humphries, John W. Parce, Harden M. McConnell
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Patent number: 4591550Abstract: Photoresponsive devices, including a photoresponsive electrode, are provided and methods for their use to measure changes in environment at a site at or about the surface of the photoresponsive device. By employing a source of light for irradiating a site on the surface and means for biasing the photoresponsive electrode in relation to a counterelectrode, a variation in electrical signal can be related to a change in a medium in photoresponsive modulation relationship to the photoresponsive electrode surface.Type: GrantFiled: April 5, 1984Date of Patent: May 27, 1986Assignee: Molecular Devices CorporationInventors: Dean Hafeman, John W. Parce, Harden M. McConnell
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Patent number: 4490216Abstract: Electroanalytical elements are provided involving a polarity-sensitive layer; a first lipid layer non-diffusively bound to said polarity-sensitive layer; and, a second amphiphilic layer, with hydrophilic heads distal from said first lipid layer and defining a polar layer which interacts with said polarity-sensitive layer. The device is used in polar media to detect variations in the electrostatic interaction between the polar layer and the polarity-sensitive layer.Type: GrantFiled: January 12, 1984Date of Patent: December 25, 1984Assignee: Molecular Devices CorporationInventor: Harden M. McConnell
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Patent number: 4222744Abstract: Assay for a ligand wherein the ligand is contacted in a fluid with (1) labeled binder or (2) binder and labeled reference ligand, and the presence of ligand determined from the movement of labeled material in at least one region of the fluid. In a particular assay, the label is a fluorescent material and ligand is determined from a change in fluoresence-time relationship in a region of the fluid.Type: GrantFiled: September 27, 1978Date of Patent: September 16, 1980Assignee: Becton Dickinson & CompanyInventor: Harden M. McConnell