Patents by Inventor Peter M. Sandvik
Peter M. Sandvik 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: 7367217Abstract: A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, InN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.Type: GrantFiled: March 8, 2007Date of Patent: May 6, 2008Assignee: General Electric CompanyInventors: Edward B. Stokes, Peter M. Sandvik, Vinayak Tilak, Jeffrey B. Fedison, Elena Babes-Dornea, Renyan Qin, James W. Rose, Stanton E. Weaver
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Patent number: 7254986Abstract: A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, lnN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.Type: GrantFiled: December 13, 2002Date of Patent: August 14, 2007Assignee: General Electric CompanyInventors: Edward B. Stokes, Peter M. Sandvik, Vinayak Tilak, Jeffrey B. Fedison, Elena Babes-Dornea, Renyan Qin, James W. Rose, Stanton E. Weaver
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Patent number: 7119372Abstract: A flip chip light emitting diode die (10, 10?, 10?) includes a light-transmissive substrate (12, 12?, 12?) and semiconductor layers (14, 14?, 14?) that are selectively patterned to define a device mesa (30, 30?, 30?). A reflective electrode (34, 34?, 34?) is disposed on the device mesa (30, 30?, 30?). The reflective electrode (34, 34?, 34?) includes a light-transmissive insulating grid (42, 42?, 60, 80) disposed over the device mesa (30, 30?, 30?), an ohmic material (44, 44?, 44?, 62) disposed at openings of the insulating grid (42, 42?, 60, 80) and making ohmic contact with the device mesa (30, 30?, 30?), and an electrically conductive reflective film (46, 46?, 46?) disposed over the insulating grid (42, 42?, 60, 80) and the ohmic material (44, 44?, 44?, 62). The electrically conductive reflective film (46, 46?, 46?) electrically communicates with the ohmic material (44, 44?, 44?, 62).Type: GrantFiled: October 24, 2003Date of Patent: October 10, 2006Assignee: GELcore, LLCInventors: Edward B. Stokes, Mark P. D'Evelyn, Stanton E. Weaver, Peter M. Sandvik, Abasifreke U. Ebong, Xian-an Cao, Steven F. LeBoeuf, Nikhil R. Taskar
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Patent number: 7112796Abstract: An optical spectrometer for combustion flame temperature determination includes at least two photodetectors positioned for receiving light from a combustion flame, each of the at least two photodetectors having a different, overlapping bandwidth for detecting a respective output signal in an ultraviolet emission band; and a computer for subtracting a respective output signal of a first one of the at least two photodetectors from a respective output signal of a second one of the at least two photodetectors to obtain a segment signal, and using the segment signal to determine the combustion flame temperature.Type: GrantFiled: November 6, 2003Date of Patent: September 26, 2006Assignee: General Electric CompanyInventors: Dale M Brown, Peter M Sandvik, Jeffrey B Fedison, Kevin S Matocha, Thomas E Johnson
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Patent number: 7098487Abstract: There is provided a GaN single crystal at least about 2 millimeters in diameter, with a dislocation density less than about 104 cm?1, and having no tilt boundaries. A method of forming a GaN single crystal is also disclosed. The method includes providing a nucleation center, a GaN source material, and a GaN solvent in a chamber. The chamber is pressurized. First and second temperature distributions are generated in the chamber such that the solvent is supersaturated in the nucleation region of the chamber. The first and second temperature distributions have different temperature gradients within the chamber.Type: GrantFiled: December 27, 2002Date of Patent: August 29, 2006Assignee: General Electric CompanyInventors: Mark Philip D'Evelyn, Dong-Sil Park, Steven LeBoeuf, Larry Rowland, Kristi Narang, Huicong Hong, Peter M. Sandvik
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Patent number: 7002156Abstract: A detection system for detecting gamma rays including a scintillator crystal for receiving at least one gamma ray and generating at least one ultraviolet ray and an avalanche photodiode for detecting the ultraviolet ray. The avalanche photodiode includes: a substrate having a first dopant; a first layer having a second dopant, positioned on top of the substrate; a passivation layer for providing electrical passivation on a surface of the avalanche photodiode; a phosphorous silicate glass layer for limiting mobile ion transport, positioned above of the first layer; and a pair of metal electrodes for providing an ohmic contact wherein a first electrode is positioned below the substrate and a second electrode is positioned above the first layer. The avalanche photodiode comprises a first sidewall and a second sidewall forming a sloped mesa shape.Type: GrantFiled: November 19, 2004Date of Patent: February 21, 2006Assignee: General Electric CompanyInventors: Peter M. Sandvik, Dale M. Brown, Stephen D. Arthur, Kevin S. Matocha, James W. Kretchmer
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Patent number: 6838741Abstract: An aspect of the present invention is directed to an avalanche photodiode (APD) device for use in oil well drilling applications in harsh, down-hole environments where shock levels are near 250 gravitational acceleration (G) and/or temperatures approach or exceed 150° C. Another aspect of the present invention is directed to an APD device fabricated using SiC materials. Another aspect of the present invention is directed to an APD device fabricated using GaN materials.Type: GrantFiled: December 10, 2002Date of Patent: January 4, 2005Assignee: General Electtric CompanyInventors: Peter M. Sandvik, Dale M. Brown, Stephen D. Arthur, Kevin S. Matocha, James W. Kretchmer
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Patent number: 6784430Abstract: A flame sensor for combustion flame temperature determination comprises elongated extensions that are positioned with parallel interdigitated longitudinal axis with respect to one another. An optical spectrometer comprises the sensor and a system comprises the sensor. A method for combustion flame temperature determination comprises obtaining a first photodiode signal and a second photodiode signal by using photodiode devices comprising photodiodes with elongated extending interdigitated digits. A method of fabricating a flame sensor for combustion flame temperature determination, comprises forming first and second photodiodes with elongated extending interdigitated digits.Type: GrantFiled: October 23, 2002Date of Patent: August 31, 2004Assignee: General Electric CompanyInventors: Kevin S. Matocha, Jeffrey B. Fedison, James W. Kretchmer, Dale M. Brown, Peter M. Sandvik
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Publication number: 20040112764Abstract: A multi-gas sensor device for the detection of dissolved hydrocarbon gases in oil-filled electrical equipment. The device comprising a semiconductor substrate, one or more catalytic metal gate-electrodes deposited on the surface of the semiconductor substrate operable for sensing various gases, and an ohmic contact deposited on the surface of the semiconductor substrate. The semiconductor substrate comprises one of GaN, SiC, AlN, InN, AlGaN, InGaN and AlInGaN. A method for sensing gas in an oil-filled reservoir of electrical equipment, comprising providing a sensor device, immersing the sensor device in the oil-filled reservoir, allowing the gases emitted from the oil to interact with the one or more catalytic metal gate-electrodes, altering the gas as it contacts the catalytic metal gate-electrodes and altering the sensitivity of the sensor.Type: ApplicationFiled: December 13, 2002Publication date: June 17, 2004Inventors: Edward B. Stokes, Peter M. Sandvik, Vinayak Tilak, Jeffrey B. Fedison, Elena Babes-Dornea, Renyan Qin, James W. Rose, Stanton E. Weaver
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Publication number: 20040108530Abstract: An aspect of the present invention is directed to an avalanche photodiode (APD) device for use in oil well drilling applications in harsh, down-hole environments where shock levels are near 250 gravitational acceleration (G) and/or temperatures approach or exceed 150° C. Another aspect of the present invention is directed to an APD device fabricated using SiC materials. Another aspect of the present invention is directed to an APD device fabricated using GaN materials.Type: ApplicationFiled: December 10, 2002Publication date: June 10, 2004Applicant: General Electric CompanyInventors: Peter M. Sandvik, Dale M. Brown, Stephen D. Arthur, Kevin S. Matocha, James W. Kretchmer
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Publication number: 20040089810Abstract: An optical spectrometer for combustion flame temperature determination includes at least two photodetectors positioned for receiving light from a combustion flame, each of the at least two photodetectors having a different, overlap ping bandwidth for detecting a respective output signal in an ultraviolet emission band; and a computer for subtracting a respective output signal of a first one of the at least two photodetectors from a respective output signal of a second one of the at least two photodetectors to obtain a segment signal, and using the segment signal to determine the combustion flame temperature.Type: ApplicationFiled: November 6, 2003Publication date: May 13, 2004Applicant: General Electric CompamyInventors: Dale M. Brown, Peter M. Sandvik, Jeffrey B. Fedison, Kevin S. Matocha, Thomas E. Johnson
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Publication number: 20030080294Abstract: A flame sensor for combustion flame temperature determination, comprising a first photodiode formed with elongated extending digits, and having a range of optical responsivity within an OH band for producing a first output signal; and a second photodiode formed with for receiving light from a combustion flame and having a range of optical responsivity in a different and overlapping portion of the OH band than the first photodiode device OH band for producing a second output signal; wherein the elongated extensions are positioned with parallel interdigitated longitudinal axis with respect to one another. An optical spectrometer comprises the sensor and a system comprises the sensor.Type: ApplicationFiled: October 23, 2002Publication date: May 1, 2003Inventors: Kevin S. Matocha, Jeffrey B. Fedison, James W. Kretchmer, Dale M. Brown, Peter M. Sandvik