Patents by Inventor Jianguo Wen
Jianguo Wen 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: 20240162682Abstract: An external cavity tunable laser includes a gain median module to generate a broadband optical spectrum covering a predetermined wavelength range; a collimate lens turning a diverging beam into a collimated beam; a pair of etalons to tune frequency; an actuator to adjust an external cavity optical pathlength; a bandpass filter to block one or more frequencies outside the predetermined wavelength range; a beam splitter to split a percentage of the beam to a photodetector; a reflection mirror for feedback to gain median waveguide; an isolator for preventing reflecting light back to the external cavity; and a hermetically sealed housing less than 0.15 cubic centimeters.Type: ApplicationFiled: November 15, 2022Publication date: May 16, 2024Inventors: Zhigang Zhou, Kevin Boyd, Guang-Hua Duan, Min Huang, Zhenming Xie, Rihao Li, Qiang Liu, Huixian Wen, Jianguo Wang
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Patent number: 11970357Abstract: The present application relates to the technical field of fiber winding control, and provides a tension control method of a multi-bundle winding equipment combined driving system, which solves the problem that the tension fluctuates greatly and cannot be output constantly in the fiber winding process.Type: GrantFiled: November 3, 2023Date of Patent: April 30, 2024Assignee: TAIYUAN UNIVERSITY OF TECHNOLOGYInventors: Jianguo Liang, Qingxue Huang, Yujie Duan, Xinyu Wen, Lianyun Jiang, Chunjiang Zhao, Xiaodong Zhao, Yinhui Li, Haifeng Gao, Jianglin Liu
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Publication number: 20240131612Abstract: Disclosed are a special tooling and method for electron beam welding of a cavity body and a beam tube of a superconducting niobium cavity. The special tooling includes a first clamping device for fixing a flange and a second clamping device for fixing a semi-cavity body, wherein the first clamping device and the second clamping device are fixedly connected. A pressing ring of the first clamping device is disposed around a beam tube of a superconducting niobium cavity and cooperates with a base plate to clamp and fix the flange. The second clamping device includes clamping arms evenly distributed along a circumference of the semi-cavity body, and each clamping arm includes a second pressing plate axially disposed along the beam tube and a pressing block that is disposed on an end portion of the second pressing plate and fixes an edge of the semi-cavity body.Type: ApplicationFiled: October 18, 2023Publication date: April 25, 2024Inventors: Jianguo Ma, Wei Wen, Zhihong Liu, Jia Tao, Zhenfei Liu, Liming Peng, Nian Liu, Jiefeng Wu
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Patent number: 9590248Abstract: An active material composition includes a porous graphene nanocage and a source material. The source material may be a sulfur material. The source material may be an anodic material. A lithium-sulfur battery is provided that includes a cathode, an anode, a lithium salt, and an electrolyte, where the cathode of the lithium-sulfur battery includes a porous graphene nanocage and a sulfur material and at least a portion of the sulfur material is entrapped within the porous graphene nanocage. Also provided is a lithium-air battery that includes a cathode, an anode, a lithium salt, and an electrolyte, where the cathode includes a porous graphene nanocage and where the cathode may be free of a cathodic metal catalyst.Type: GrantFiled: March 12, 2013Date of Patent: March 7, 2017Assignee: UCHICAGO ARGONNE, LLCInventors: Khalil Amine, Jun Lu, Peng Du, Jianguo Wen, Larry A. Curtiss
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Publication number: 20140272610Abstract: An active material composition includes a porous graphene nanocage and a source material. The source material may be a sulfur material. The source material may be an anodic material. A lithium-sulfur battery is provided that includes a cathode, an anode, a lithium salt, and an electrolyte, where the cathode of the lithium-sulfur battery includes a porous graphene nanocage and a sulfur material and at least a portion of the sulfur material is entrapped within the porous graphene nanocage. Also provided is a lithium-air battery that includes a cathode, an anode, a lithium salt, and an electrolyte, where the cathode includes a porous graphene nanocage and where the cathode may be free of a cathodic metal catalyst.Type: ApplicationFiled: March 12, 2013Publication date: September 18, 2014Applicant: UCHICAGO ARGONNE, LLCInventors: Khalil Amine, Jun Lu, Peng Du, Jianguo Wen, Larry A. Curtiss
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Publication number: 20120017415Abstract: A method for using a reusable sample-holding device for readily loading very small wet samples for observation of the samples by microscopic equipment, in particular in a vacuum environment. The method may be used with a scanning electron microscope (SEM), a transmission electron microscope (TEM), an X-ray microscope, optical microscope, and the like. For observation of the sample, the method provides a thin-membrane window etched in the center of each of two silicon wafers abutting to contain the sample in a small uniform gap formed between the windows. This gap may be adjusted by employing spacers. Alternatively, the thickness of a film established by the fluid in which the sample is incorporated determines the gap without need of a spacer. To optimize resolution each window may have a thickness on the order of 50 nm and the gap may be on the order of 50 nm.Type: ApplicationFiled: September 22, 2011Publication date: January 26, 2012Inventors: Charles P. MARSH, Eric OLSON, Todor I. DONCHEV, Ivan PETROV, Jianguo WEN, Ryan FRANKS, Dongxiang LIAO
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Patent number: 8102523Abstract: A method for using a reusable sample-holding device for readily loading very small wet samples for observation of the samples by microscopic equipment, in particular in a vacuum environment. The method may be used with a scanning electron microscope (SEM), a transmission electron microscope (TEM), an X-ray microscope, optical microscope, and the like. For observation of the sample, the method provides a thin-membrane window etched in the center of each of two silicon wafers abutting to contain the sample in a small uniform gap formed between the windows. This gap may be adjusted by employing spacers. Alternatively, the thickness of a film established by the fluid in which the sample is incorporated determines the gap without need of a spacer. To optimize resolution each window may have a thickness on the order of 50 nm and the gap may be on the order of 50 nm.Type: GrantFiled: September 22, 2011Date of Patent: January 24, 2012Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Charles P. Marsh, Eric Olson, Todor I. Donchev, Ivan Petrov, Jianguo Wen, Ryan Franks, Dongxiang Liao
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Patent number: 8059271Abstract: A reusable sample-holding device for readily loading very small wet samples for observation of the samples by microscopic equipment, in particular in a vacuum environment. Embodiments may be used with a scanning electron microscope (SEM), a transmission electron microscope (TEM), an X-ray microscope, optical microscope, and the like. For observation of the sample, embodiments provide a thin-membrane window etched in the center of each of two silicon wafers abutting to contain the sample in a small uniform gap formed between the windows. This gap may be adjusted by employing spacers. Alternatively, the thickness of a film established by the fluid in which the sample is incorporated determines the gap without need of a spacer. To optimize resolution each window may have a thickness on the order of 50 nm and the gap may be on the order of 50 nm.Type: GrantFiled: February 4, 2009Date of Patent: November 15, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Charles P. Marsh, Eric Olson, Todor I. Donchev, Ivan Petrov, Jianguo Wen, Ryan Franks, Dongxiang Liao
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Publication number: 20100193398Abstract: A reusable sample-holding device for readily loading very small wet samples for observation of the samples by microscopic equipment, in particular in a vacuum environment. Embodiments may be used with a scanning electron microscope (SEM), a transmission electron microscope (TEM), an X-ray microscope, optical microscope, and the like. For observation of the sample, embodiments provide a thin-membrane window etched in the center of each of two silicon wafers abutting to contain the sample in a small uniform gap formed between the windows. This gap may be adjusted by employing spacers. Alternatively, the thickness of a film established by the fluid in which the sample is incorporated determines the gap without need of a spacer. To optimize resolution each window may have a thickness on the order of 50 nm and the gap may be on the order of 50 nm.Type: ApplicationFiled: February 4, 2009Publication date: August 5, 2010Inventors: CHARLES P. MARSH, ERIC OLSON, TODOR I. DONCHEV, IVAN PETROV, JIANGUO WEN, RYAN FRANKS, DONGXIANG LIAO
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Publication number: 20060025002Abstract: A device and method for fabricating a device holder for use with a standard holder body of a transmission electron microscope for use with in situ microscopy of both static and dynamic mechanisms. One or more electrical contact fingers is disposed between a baseplate and a frame, with a MEMS device making contact with the electrical contact fingers. A connector is provided to matingly engage the transmission electron microscope and the device holder to couple the device holder to the transmission electron microscope. Once clamped between the baseplate and frame, the electrical contact fingers may be separated from the template.Type: ApplicationFiled: July 28, 2005Publication date: February 2, 2006Inventors: Ming Zhang, Ivan Petrov, Jianguo Wen, Eric Stach, Leslie Allen, Ian Robertson, Eric Olson
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Patent number: 6871528Abstract: A method of producing a branched carbon nanotube (CNT) is disclosed. The branched CNT is used with an atomic force microscope having a cantilever and a tip and that is able to measure a surface of a substrate as well as an undercut feature of the substrate that protrudes from the surface. A catalytic material is deposited onto the tip of the microscope, and the catalytic material is subjected to chemical vapor deposition. This initiates growth of a primary branch of the branched carbon nanotube such that the primary branch extends from the tip. A secondary branch is then introduced to extend from the primary branch and produce the branched carbon nanotube. The primary branch interacts with the surface of the substrate and the secondary branch interacts with the undercut feature.Type: GrantFiled: April 14, 2003Date of Patent: March 29, 2005Assignees: University of South Florida, Boston College, Nanolab, Inc.Inventors: Rudiger Schlaf, Zhifeng F. Ren, Jianguo Wen, David L. Carnahan
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Publication number: 20040009308Abstract: A method of producing a branched carbon nanotube (CNT) is disclosed. The branched CNT is used with an atomic force microscope having a cantilever and a tip and that is able to measure a surface of a substrate as well as an undercut feature of the substrate that protrudes from the surface. A catalytic material is deposited onto the tip of the microscope, and the catalytic material is subjected to chemical vapor deposition. This initiates growth of a primary branch of the branched carbon nanotube such that the primary branch extends from the tip. A secondary branch is then introduced to extend from the primary branch and produce the branched carbon nanotube. The primary branch interacts with the surface of the substrate and the secondary branch interacts with the undercut feature.Type: ApplicationFiled: April 14, 2003Publication date: January 15, 2004Inventors: Rudiger Schlaf, Zhifeng F. Ren, Jianguo Wen, David L. Carnahan