Patents by Inventor Ravi Srinivasan
Ravi Srinivasan 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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Publication number: 20040139784Abstract: 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: ApplicationFiled: November 20, 2003Publication date: July 22, 2004Applicant: Symyx Technologies, Inc.Inventors: Ravi Srinivasan, Daniel Meron Pinkas, Shenheng Guan, Michael Myslovaty, Mikhail Spitkovsy, James R. Engstrom, H. Sam Bergh
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Publication number: 20040137872Abstract: A multi-tune radio frequency (RF) coil for concurrent magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) is disclosed. The multi-tune RF coil includes a first end ring having a generally annular opening and a first plurality of elongated segments coupled to and positioned circumferentially around the first end ring. The first plurality of elongated segments are azimuthally offset from one another by a substantially equal angular distance. A second RF coil includes a second end ring having a generally annular opening and a second plurality of elongated segments coupled to and positioned circumferentially around the second end ring. The second plurality of elongated segments are azimuthally offset from one another by a substantially equal angular distance.Type: ApplicationFiled: November 26, 2003Publication date: July 15, 2004Inventor: Ravi Srinivasan
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Publication number: 20040113602Abstract: 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: ApplicationFiled: November 17, 2003Publication date: June 17, 2004Applicant: Symyx Technologies, Inc.Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Publication number: 20040116799Abstract: An incubator for use with a magnetic resonance (MR) system, the incubator minimizing an amount of interference generated during an MR scan of the incubator is disclosed. The incubator includes an incubator housing, which includes a patient compartment, an aggregate compartment coupled to the patient compartment, and an electronics compartment coupled to the aggregate compartment. The incubator housing and an incubator frame are constructed as a uni-body assembly. A means for inhibiting insertion of the electronics compartment of the incubator housing into the MR system also is provided. Additionally, a method for improving the compatibility of a magnetic resonance (MR) accessory for maintaining or monitoring the health of a patient while undergoing magnetic resonance imaging (MRI) with an MR system is disclosed.Type: ApplicationFiled: November 26, 2003Publication date: June 17, 2004Inventor: Ravi Srinivasan
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Publication number: 20040093932Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: ApplicationFiled: November 12, 2003Publication date: May 20, 2004Applicant: Symyx Technologies, Inc.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Publication number: 20040075437Abstract: A radio frequency (RF) pediatric coil for magnetic resonance/imaging analysis is disclosed. The coil includes a first end ring having a generally annular opening, and at least one of a second end ring and an end cap. An anterior extension is formed on the first end ring and on the at least one of the second end ring and the end cap. A plurality of elongated segments are coupled to and positioned circumferentially around the first end ring and the at least one of the second end ring and the end cap to form a coil volume. A first elongated segment and a second elongated segment are spaced about the anterior extension to facilitate access into the coil volume. The coil can be implemented as a standalone coil, or it can be operatively coupled to an incubator to increase the resolution of magnetic resonance scans of a neonate inside the incubator.Type: ApplicationFiled: November 26, 2003Publication date: April 22, 2004Inventor: Ravi Srinivasan
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Patent number: 6701774Abstract: 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: GrantFiled: March 7, 2001Date of Patent: March 9, 2004Assignee: Symyx Technologies, Inc.Inventors: Ravi Srinivasan, Daniel Meron Pinkas, Shenheng Guan, Michael Myslovaty, Michael Spitkovsky, James R. Engstrom, H. Sam Bergh
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Patent number: 6690179Abstract: 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: GrantFiled: August 24, 2001Date of Patent: February 10, 2004Assignee: Symyx Technologies, Inc.Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Patent number: 6681618Abstract: The present invention relates to a miniature rheometer and improved force sensor elements which may advantageously be used in combination with the miniature rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element. Moreover, the force sensor may employ stress-optic material.Type: GrantFiled: October 1, 2002Date of Patent: January 27, 2004Assignee: Symyx Technologies, Inc.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Publication number: 20040015074Abstract: A radio frequency head coil for resonance imaging analysis of pediatric patients is disclosed. The head coil includes an end cap, an end ring, a plurality of legs connecting the end cap to the end ring, wherein the plurality of legs are spaced apart azimuthally by 45 degrees, and a plurality of drive points, wherein the drive points are bridged using a push-pull configuration.Type: ApplicationFiled: May 16, 2003Publication date: January 22, 2004Inventor: Ravi Srinivasan
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Patent number: 6668622Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: GrantFiled: July 25, 2002Date of Patent: December 30, 2003Assignee: Symyx Technologies, Inc.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Patent number: 6655194Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: GrantFiled: October 1, 2002Date of Patent: December 2, 2003Assignee: Symyx Technologies, Inc.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Patent number: 6650102Abstract: 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: GrantFiled: August 24, 2001Date of Patent: November 18, 2003Assignee: Symyx Technologies, Inc.Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Patent number: 6644101Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: GrantFiled: October 1, 2002Date of Patent: November 11, 2003Assignee: Symyx Technologies, Inc.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Publication number: 20030041672Abstract: 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: ApplicationFiled: August 24, 2001Publication date: March 6, 2003Applicant: Symyx Technologies , Inc.Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Publication number: 20030041671Abstract: 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: ApplicationFiled: August 24, 2001Publication date: March 6, 2003Applicant: Symyx Technologies, IncInventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Publication number: 20030041676Abstract: 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: ApplicationFiled: August 24, 2001Publication date: March 6, 2003Applicant: SYMYX Technologies, Inc.Inventors: Damian A. Hajduk, Eric D. Carlson, J. Christopher Freitag, Oleg Kolosov, James R. Engstrom, Adam Safir, Ravi Srinivasan, Leonid Matsiev
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Publication number: 20030033860Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: ApplicationFiled: October 1, 2002Publication date: February 20, 2003Applicant: SYMYX TECHNOLOGIES, INC.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Publication number: 20030029229Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine Theological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: ApplicationFiled: October 1, 2002Publication date: February 13, 2003Applicant: SYMYX TECHNOLOGIES, INC.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan
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Publication number: 20030024302Abstract: The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to determine rheological characteristics of materials which are provided in the form of small quantity samples. The miniature rheometer comprises an actuating element, a sensing element and a feedback circuit to provide rebalance of the shear force applied by the sample to the sensing element, which insures an exceptional stiffness in determining the shear strain so as to allow measurements of high accuracy. The parallel rheometer of the present invention allows simultaneous measurements of a plurality of samples so as to allow of a plurality of samples within a short time period. The force sensor element according to the present invention allows simultaneous measurement of a shear force and a normal force applied to the sensor element.Type: ApplicationFiled: October 1, 2002Publication date: February 6, 2003Applicant: SYMYX TECHNOLOGIES, INC.Inventors: Damian Hajduk, Eric Carlson, Ravi Srinivasan