Patents by Inventor Chris S. Cowles
Chris S. Cowles 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: 10502721Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: GrantFiled: May 14, 2019Date of Patent: December 10, 2019Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Patent number: 10481136Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: GrantFiled: May 14, 2019Date of Patent: November 19, 2019Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Patent number: 10481137Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: GrantFiled: July 2, 2019Date of Patent: November 19, 2019Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Publication number: 20190323999Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: ApplicationFiled: July 2, 2019Publication date: October 24, 2019Applicant: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Publication number: 20190265208Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: ApplicationFiled: May 14, 2019Publication date: August 29, 2019Applicant: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Publication number: 20190265209Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: ApplicationFiled: May 14, 2019Publication date: August 29, 2019Applicant: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Patent number: 10324069Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: GrantFiled: February 24, 2017Date of Patent: June 18, 2019Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Publication number: 20180246074Abstract: A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.Type: ApplicationFiled: February 24, 2017Publication date: August 30, 2018Applicant: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris Bishop, Robert Simpson, Chris S. Cowles, Dale Ashworth, Douglas Dailey
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Patent number: 8772680Abstract: The adaptive temperature controller system includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: GrantFiled: November 20, 2013Date of Patent: July 8, 2014Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Publication number: 20140076885Abstract: The adaptive temperature controller system includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: ApplicationFiled: November 20, 2013Publication date: March 20, 2014Applicant: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Patent number: 8642931Abstract: The adaptive temperature controller includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: GrantFiled: October 24, 2008Date of Patent: February 4, 2014Assignee: Valco Instruments Company, L.P.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Publication number: 20090045187Abstract: The adaptive temperature controller includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: ApplicationFiled: October 24, 2008Publication date: February 19, 2009Applicant: VALCO INSTRUMENTS CO., INC.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Patent number: 7442902Abstract: The adaptive temperature controller includes an ambient temperature sensor, a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at or near ambient temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its instant temperature is known. Additionally, the adaptive temperature controller determines the responsiveness of the electrically-conductive material to determine the predicted increase in temperature and rate of increase in temperature relative to increases in voltage, current or power. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: GrantFiled: March 13, 2007Date of Patent: October 28, 2008Assignee: Valco Instruments Co., Inc.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Publication number: 20070210285Abstract: The adaptive temperature controller includes an ambient temperature sensor, a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at or near ambient temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its instant temperature is known. Additionally, the adaptive temperature controller determines the responsiveness of the electrically-conductive material to determine the predicted increase in temperature and rate of increase in temperature relative to increases in voltage, current or power. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.Type: ApplicationFiled: March 13, 2007Publication date: September 13, 2007Applicant: VALCO INSTRUMENTS CO., INC.Inventors: Stanley D. Stearns, Huamin Cai, Chris S. Cowles
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Patent number: 6933771Abstract: The present invention provides a bias generation circuit in which the voltage of electrically isolated circuits are stabilized by providing a photovoltaic diode in each circuit, a common light source uniformly positioned to provide equivalent energy to each photovoltaic diode and an operational amplifier, configured with a capacitor as an integration circuit, driving the common light source, wherein one isolated circuit provides feedback to the amplifier, such that variations in the voltage in the isolated circuit causes the amplifier to provide an adjusted signal to the common light source, adjusting the energy output to compensate for voltage variations simultaneously, yet independently occurring in each isolated photovoltaic diode circuit. Such bias voltage circuit may be used with chromatographic ionization detectors as well other devices.Type: GrantFiled: July 15, 2003Date of Patent: August 23, 2005Inventors: Stanley D. Stearns, Chris S. Cowles