Patents by Inventor James R. Engstrom

James R. Engstrom 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).

  • Publication number: 20110220874
    Abstract: A nanostructured composite material comprising semiconductor nanocrystals in a crystalline semiconductor matrix. Suitable nanocrystals include silicon, germanium, and silicon-germanium alloys, and lead salts such as PbS, PbSe, and PbTe. Suitable crystalline semiconductor matrix materials include Si and silicon-germanium alloys. A process for making the nanostructured composite materials. Devices comprising nanostructured composite materials.
    Type: Application
    Filed: August 10, 2009
    Publication date: September 15, 2011
    Inventors: Tobias Hanrath, James R. Engstrom
  • Patent number: 7829150
    Abstract: Systems and methods for preparing inorganic-organic interfaces using organo-transition metal complexes and self-assembled monolayers as organic surfaces. In one embodiment, a silicon wafer is cleaned and reacted with stabilized pirhana etch to provide an oxide surface. The surface is reacted with the trichlorosilyl end of alkyltrichlorosilanes to prepare self assembling monomers (SAMs). The alkyltrichlorosilanes have the general formula R1-R—SiCl3, where R1 is —OH, —NH2, —COOH, —SH, COOCH3, —CN, and R is a conjugated hydrocarbon, such as (CH2)n where n is in the range of 3 to 18. The functionalized end of the SAM can optionally modified chemically as appropriate, and is then reacted with metal-bearing species such as tetrakis(dimethylamido)titanium, Ti[N(CH3)2]4, (TDMAT) to provide a titanium nitride layer.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: November 9, 2010
    Assignee: Cornell Research Foundation, Inc.
    Inventors: James R. Engstrom, Aravind S. Killampalli, Paul F. Ma
  • Patent number: 7281408
    Abstract: Gas chromatographs of the invention generally comprise four or more analysis channels. Specifically, four or more gas chromatography columns are configured for parallel analysis of four or more gaseous samples with detection being effected using a microdetector array comprising four or more microdetectors. In one embodiment, the four or more microdetectors 510 are microfabricated detectors, and are integrally formed with a substrate or with one or more microchip bodies mounted on a substrate. In a preferred embodiment, a microdetector array comprises four or more thermal conductivity detectors having one or more thin-film detection filaments. A preferred heated environment for highly parallel gas chromatographs is also disclosed.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: October 16, 2007
    Assignee: Symyx Technologies, Inc.
    Inventors: Ravi Srinivasan, Daniel M. Pinkas, Shenheng Guan, Michael Myslovaty, Mikhail Spitkovsy, James R. Engstrom, H. Sam Bergh
  • Patent number: 7150994
    Abstract: Parallel flow reaction systems comprising four or more reaction channels are disclosed. Distribution systems, and parallel flow reaction systems comprising such distribution systems are also disclosed. Specifically, the distribution systems comprise one or more subsystems, including for example, a flow-partitioning subsystem for providing a different flow rate to each of the four or more reactors, a pressure-partitioning subsystem for providing a different reaction pressure in the reaction cavity of each of the four or more reactors, and a feed-composition subsystem for providing a different feed composition to each of the four or more reactors. In preferred embodiments, the one or more subsystems can comprise at least one set of four or more flow restrictors, each of the four or more flow restrictors having a flow resistance that varies relative to other flow restrictors in the set.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: December 19, 2006
    Assignee: Symyx Technologies, Inc.
    Inventors: H. Sam Bergh, James R. Engstrom, Shenheng Guan, Daniel Meron Pinkas, Kyle W. Self
  • Patent number: 7122156
    Abstract: Parallel flow reaction systems comprising four or more reaction channels are disclosed. Distribution systems, and parallel flow reaction systems comprising such distribution systems are also disclosed. Specifically, the distribution systems comprise a feed-composition subsystem for providing a different feed composition to each of the four or more reactors. In preferred embodiments, the feed composition subsystem comprises at least one set of four or more feed-component flow restrictors, each of the four or more feed-component flow restrictors having a flow resistance that varies relative to other flow restrictors in the set.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: October 17, 2006
    Assignee: Symyx Technologies, Inc.
    Inventors: H. Sam Bergh, James R. Engstrom, Shenheng Guan, Daniel Meron Pinkas, Kyle W. Self
  • Patent number: 7118917
    Abstract: Parallel flow chemical processing systems, such as parallel flow chemical reaction systems are disclosed. These systems are adapted to simultaneously and independently vary temperature between separate flow channels, preferably by employing separate, individual heating elements in thermal communication with each of four or more parallel flow reactors. The flow reactors are preferably isolated from each other using a thermal isolation system comprising fluid-based heat exchange. In preferred embodiments, the axial heat flux can be fixedly or controllably varied.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: October 10, 2006
    Assignee: Symyx Technologies, Inc.
    Inventors: H. Sam Bergh, Shenheng Guan, James R. Engstrom, Steffen Hardt, Astrid Lohf, Frank Michel
  • Patent number: 6936471
    Abstract: An apparatus and method for screening combinatorial libraries of materials by measuring the response of individual library members to mechanical perturbations is described. The apparatus generally includes a sample holder for containing the library members, an array of probes for mechanically perturbing individual library members, and an array of sensors for measuring the response of each of the library members to the mechanical perturbations. Library members undergoing screening make up a sample array, and individual library members constitute elements of the sample array that are confined to specific locations on the sample holder. During screening, the apparatus mechanically perturbs individual library members by displacing the sample array (sample holder) and the array of probes. Typically, all of the elements of the sample array are perturbed simultaneously, but the apparatus also can also perturb individual or groups of sample array elements sequentially.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: August 30, 2005
    Assignee: Symyx Technologies, Inc.
    Inventors: Damian Hajduk, Eric Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20040155668
    Abstract: A method for high throughput mechanical property testing of materials libraries using capacitance. The method monitors the responses of a plurality of samples on a substrate to a force induced by a capacitor.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 12, 2004
    Applicant: Symyx Technologies, Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Patent number: 6772642
    Abstract: A method for high throughput mechanical property and bulge testing of materials libraries. A plurality of samples on a substrate are monitored for their response to a force from a fluid.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: August 10, 2004
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20040139784
    Abstract: Gas chromatographs of the invention generally comprise four or more analysis channels. Specifically, four or more gas chromatography columns are configured for parallel analysis of four or more gaseous samples with detection being effected using a microdetector array comprising four or more microdetectors. In one embodiment, the four or more microdetectors 510 are microfabricated detectors, and are integrally formed with a substrate or with one or more microchip bodies mounted on a substrate. In a preferred embodiment, a microdetector array comprises four or more thermal conductivity detectors having one or more thin-film detection filaments. A preferred heated environment for highly parallel gas chromatographs is also disclosed.
    Type: Application
    Filed: November 20, 2003
    Publication date: July 22, 2004
    Applicant: Symyx Technologies, Inc.
    Inventors: Ravi Srinivasan, Daniel Meron Pinkas, Shenheng Guan, Michael Myslovaty, Mikhail Spitkovsy, James R. Engstrom, H. Sam Bergh
  • Publication number: 20040113602
    Abstract: The present invention provides instruments and methods for screening combinatorial libraries that addresses many of the problems encountered when using conventional instruments. For example, the disclosed instruments can measure mechanical properties of library members in rapid serial or parallel test format, and can perform tests on small amounts of material, which are easily prepared or dispensed using art-disclosed liquid or solid handling techniques. Compared to conventional instruments, the disclosed instruments afford faster sample loading and unloading, for example, through the use of disposable libraries of material samples.
    Type: Application
    Filed: November 17, 2003
    Publication date: June 17, 2004
    Applicant: Symyx Technologies, Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Patent number: 6701774
    Abstract: Gas chromatographs of the invention generally comprise four or more analysis channels. Specifically, four or more gas chromatography columns are configured for parallel analysis of four or more gaseous samples with detection being effected using a microdetector array comprising four or more microdetectors. In one embodiment, the four or more microdetectors 510 are microfabricated detectors, and are integrally formed with a substrate or with one or more microchip bodies mounted on a substrate. In a preferred embodiment, a microdetector array comprises four or more thermal conductivity detectors having one or more thin-film detection filaments. A preferred heated environment for highly parallel gas chromatographs is also disclosed.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: March 9, 2004
    Assignee: Symyx Technologies, Inc.
    Inventors: Ravi Srinivasan, Daniel Meron Pinkas, Shenheng Guan, Michael Myslovaty, Michael Spitkovsky, James R. Engstrom, H. Sam Bergh
  • Patent number: 6690179
    Abstract: One aspect of the present invention provides instruments for measuring mechanical properties of a combinatorial library of materials. The instruments include at least one capacitor to which a member of a library of material samples is removably secured for testing; at least one voltage source for delivering one or more forces to each library member; and at least one sensing device for monitoring the response each library member to the one or more forces. Another aspect of the present invention provides methods of screening a combinatorial library of materials where the method monitors the responses of a plurality of samples on a substrate to a force induced by a capacitor.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: February 10, 2004
    Assignee: Symyx Technologies, Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Patent number: 6650102
    Abstract: The present invention provides instruments and methods for screening combinatorial libraries that addresses many of the problems encountered when using conventional instruments. For example, the disclosed instruments can measure mechanical properties of library members in rapid serial or parallel test format, and can perform tests on small amounts of material, which are easily prepared or dispensed using art-disclosed liquid or solid handling techniques. Compared to conventional instruments, the disclosed instruments afford faster sample loading and unloading, for example, through the use of disposable libraries of material samples.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: November 18, 2003
    Assignee: Symyx Technologies, Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20030041676
    Abstract: A method for high throughput mechanical property testing of materials libraries using a piezoelectric. A plurality of samples on a substrate are monitored for their response to a force applied piezoelectrically.
    Type: Application
    Filed: August 24, 2001
    Publication date: March 6, 2003
    Applicant: SYMYX Technologies, Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20030041672
    Abstract: A method for high throughput mechanical property and bulge testing of materials libraries. A plurality of samples on a substrate are monitored for their response to a force from a fluid.
    Type: Application
    Filed: August 24, 2001
    Publication date: March 6, 2003
    Applicant: Symyx Technologies , Inc.
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20030041671
    Abstract: A method for high throughput mechanical property testing of materials libraries using capacitance. The method monitors the responses of a plurality of samples on a substrate to a force induced by a capacitor.
    Type: Application
    Filed: August 24, 2001
    Publication date: March 6, 2003
    Applicant: Symyx Technologies, Inc
    Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
  • Publication number: 20020170976
    Abstract: Parallel flow chemical processing systems, such as parallel flow chemical reaction systems are disclosed. These systems are adapted to simultaneously and independently vary temperature between separate flow channels, preferably by employing separate, individual heating elements in thermal communication with each of four or more parallel flow reactors. The flow reactors are preferably isolated from each other using a thermal isolation system comprising fluid-based heat exchange. In preferred embodiments, the axial heat flux can be fixedly or controllably varied.
    Type: Application
    Filed: March 7, 2002
    Publication date: November 21, 2002
    Inventors: H. Sam Bergh, Shenheng Guan, James R. Engstrom, Steffen Hardt, Astrid Lohf, Frank Michel
  • Publication number: 20020048536
    Abstract: Parallel flow reaction systems comprising four or more reaction channels are disclosed. Distribution systems, and parallel flow reaction systems comprising such distribution systems are also disclosed. Specifically, the distribution systems comprise one or more subsystems, including for example, a flow-partitioning subsystem for providing a different flow rate to each of the four or more reactors, a pressure-partitioning subsystem for providing a different reaction pressure in the reaction cavity of each of the four or more reactors, and a feed-composition subsystem for providing a different feed composition to each of the four or more reactors. In preferred embodiments, the one or more subsystems can comprise at least one set of four or more flow restrictors, each of the four or more flow restrictors having a flow resistance that varies relative to other flow restrictors in the set.
    Type: Application
    Filed: March 7, 2001
    Publication date: April 25, 2002
    Inventors: H. Sam Bergh, James R. Engstrom, Shenheng Guan, Daniel Meron Pinkas, Kyle W. Self
  • Publication number: 20020045265
    Abstract: Parallel flow reaction systems comprising four or more reaction channels are disclosed. Distribution systems, and parallel flow reaction systems comprising such distribution systems are also disclosed. Specifically, the distribution systems comprise a feed-composition subsystem for providing a different feed composition to each of the four or more reactors. In preferred embodiments, the feed composition subsystem comprises at least one set of four or more feed-component flow restrictors, each of the four or more feed-component flow restrictors having a flow resistance that varies relative to other flow restrictors in the set.
    Type: Application
    Filed: March 8, 2001
    Publication date: April 18, 2002
    Inventors: H. Sam Bergh, James R. Engstrom, Shenheng Guan, Daniel Meron Pinkas, Kyle W. Self