Patents by Inventor Limin Chen

Limin Chen 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: 20250158876
    Abstract: A system includes a programmable logic controller (PLC); a primary master device; a standby master device; and a plurality of slave devices, wherein the primary master device is configured to communicate with each of the plurality of slave devices, and wherein the PLC is configured to determine that the primary master device is in a failure state, and in response, the PLC is configured to switch from the primary master device to the standby master device such that the standby master device is configured to communicate with each of the plurality of slave devices.
    Type: Application
    Filed: November 13, 2024
    Publication date: May 15, 2025
    Inventor: Limin Chen
  • Publication number: 20250122775
    Abstract: An apparatus for controlling a subsea blowout preventor (BOP) includes a control system for controlling a subsea BOP of a subsea stack assembly installed over a subsea oil and gas well. The control system includes a first topside control device and a second topside control device, and a first subsea control device and a second subsea control device. The first topside control device, the second topside control device, the first subsea control device, and the second subsea control device are each communicatively connected with the BOP and operable to control operation of the BOP. The first subsea control device is a portion of a first control pod of the subsea stack assembly. The second subsea control device is a portion of a second control pod of the subsea stack assembly. The first topside control device is communicatively connected with the second topside control device via a ring communication network.
    Type: Application
    Filed: September 8, 2022
    Publication date: April 17, 2025
    Inventors: Vikas Rakhunde, Dinesh Kumar Dhamodaran, Limin Chen, Nick Krippner, Dhinesh Prabhu Nataraja Prabu, Matthew Olson
  • Patent number: 12055463
    Abstract: A process for applying a fluorescent leak detection dye to a component of an air conditioning system. The process involves the steps of (i) providing a fluorescent dye that is solid at room temperature, (ii) exposing the dye to an elevated temperature to melt the dye into a liquid or flowable state, (iii) injecting, channeling, spraying or placing the flowable dye into or on a component or an HVAC or A/C system, (iv) allowing the dye to resolidify in or on the component, (v) attaching the component to the HVAC or A/C system, and (iv) dissolving the resolidified dye in a liquid/gas.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: August 6, 2024
    Assignee: Spectronics Corporation
    Inventors: John Duerr, Limin Chen
  • Publication number: 20240259230
    Abstract: A system for controlling equipment at a wellsite includes a surface PLC, a first subsea PLC, a second subsea PLC, a first CAN module, a second CAN module, and a CAN network. The surface PLC is configured to receive a parameter that is measured by a sensor and to transmit a first signal to the first subsea PLC, the second subsea PLC, or both in response to the parameter. The first subsea PLC or the second subsea PLC, or both are configured to transmit a second signal to the first CAN module, the second CAN module, or both in response to the first signal. The first CAN module, the second CAN module, or both are configured to transmit a third signal to the CAN network in response to the second signal. The CAN network is configured to control the equipment in response to the third signal.
    Type: Application
    Filed: November 16, 2023
    Publication date: August 1, 2024
    Inventors: Limin Chen, Vikas Rakhunde
  • Publication number: 20230398380
    Abstract: A workflow has been developed that enables initially mapping of a focused ultrasound (FUS) beam using magnetic resonance (MR) thermometry or MR-acoustic radiation force imaging (MR-ARFI) while working within the MRI device. During this procedure, key measurements will be taken including the precise location of the transducer relative to the skull and the transducer parameters (such as amplitudes and phases) required to place the ultrasound focus at the desired focal size and location in the skull. The anatomical measurements will be used to build a patient-specific, device-specific stereotactic frame to hold the transducer in the position relative to the skull and the aberration corrects will be applied. FUS therapy can then be delivered to the patient outside of the MR environment.
    Type: Application
    Filed: October 8, 2021
    Publication date: December 14, 2023
    Inventors: Charles F. Caskey, Limin Chen, William A. Grissom, Peter E. Konrad, Benoit M. Dawant, Willliam J. Rodriguez
  • Patent number: 11824682
    Abstract: A system for controlling equipment at a wellsite includes a surface PLC, a first subsea PLC, a second subsea PLC, a first CAN module, a second CAN module, and a CAN network. The surface PLC is configured to receive a parameter that is measured by a sensor and to transmit a first signal to the first subsea PLC, the second subsea PLC, or both in response to the parameter. The first subsea PLC or the second subsea PLC, or both are configured to transmit a second signal to the first CAN module, the second CAN module, or both in response to the first signal. The first CAN module, the second CAN module, or both are configured to transmit a third signal to the CAN network in response to the second signal. The CAN network is configured to control the equipment in response to the third signal.
    Type: Grant
    Filed: January 27, 2023
    Date of Patent: November 21, 2023
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Limin Chen, Vikas Rakhunde
  • Patent number: 11467054
    Abstract: Provided is a porous pellet for inclusion into an operating fluid of a fluid system for detecting sites of fluid leakage. The porous pellet comprises a solid matrix formed by at least one fluorescent dye which is solid at room temperature. The matrix has a porosity of from about 10% to about 90%. Methods of installing the porous pellets into fluid system for detection of leaks is also provided.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 11, 2022
    Assignee: Spectronics Corporation
    Inventors: Jonathan Daniel Cooper, Limin Chen, John Thomas Duerr, Jennifer Marie Hunt
  • Publication number: 20210379875
    Abstract: A light blocking composite film and preparation method and use thereof. The light blocking composite film comprises a middle non-woven fabric layer, and at least one light-reflective layer and at least one light-absorptive layer alternately arranged on each side of the non-woven fabric layer, wherein the light-reflective layer is made of a resin containing light-reflective particles, and the light-absorptive layer is made of a resin containing light-absorptive particles. The light blocking composite film of the present invention has the advantages of good blocking, not easy to curl, good durability, light-weight structure, beautiful color and the like.
    Type: Application
    Filed: February 28, 2019
    Publication date: December 9, 2021
    Inventors: Limin CHEN, Ruixiang YAN
  • Publication number: 20210041322
    Abstract: A process for applying a fluorescent leak detection dye to a component of an air conditioning system. The process involves the steps of (i) providing a fluorescent dye that is solid at room temperature, (ii) exposing the dye to an elevated temperature to melt the dye into a liquid or flowable state, (iii) injecting, channeling, spraying or placing the flowable dye into or on a component or an HVAC or A/C system, (iv) allowing the dye to resolidify in or on the component, (v) attaching the component to the HVAC or A/C system, and (iv) dissolving the resolidified dye in a liquid/gas.
    Type: Application
    Filed: August 6, 2020
    Publication date: February 11, 2021
    Applicant: Spectronics Corporation
    Inventors: John DUERR, Limin CHEN
  • Patent number: 10401253
    Abstract: Provided is a porous pellet for inclusion into an operating fluid of a fluid system for detecting sites of fluid leakage. The porous pellet comprises a solid matrix formed by at least one fluorescent dye which is solid at room temperature. The matrix has a porosity of from about 10% to about 90%. Methods of installing the porous pellets into fluid system for detection of leaks is also provided.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: September 3, 2019
    Assignee: Spectronics Corporation
    Inventors: Jonathan Daniel Cooper, Limin Chen, John Thomas Duerr, Jennifer Marie Hunt
  • Publication number: 20180292288
    Abstract: Provided is a porous pellet for inclusion into an operating fluid of a fluid system for detecting sites of fluid leakage. The porous pellet comprises a solid matrix formed by at least one fluorescent dye which is solid at room temperature. The matrix has a porosity of from about 10% to about 90%. Methods of installing the porous pellets into fluid system for detection of leaks is also provided.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 11, 2018
    Inventors: Jonathan Daniel COOPER, Limin CHEN, John Thomas DUERR, Jennifer Marie HUNT
  • Publication number: 20180292287
    Abstract: Provided is a porous pellet for inclusion into an operating fluid of a fluid system for detecting sites of fluid leakage. The porous pellet comprises a solid matrix formed by at least one fluorescent dye which is solid at room temperature. The matrix has a porosity of from about 10% to about 90%. Methods of installing the porous pellets into fluid system for detection of leaks is also provided.
    Type: Application
    Filed: April 11, 2017
    Publication date: October 11, 2018
    Applicant: Spectronics Corporation
    Inventors: Jonathan Daniel COOPER, Limin CHEN, John Thomas DUERR, Jennifer Marie HUNT
  • Publication number: 20180160838
    Abstract: The present disclosure provides a composite film, a producing method of the composite film, a T-die structure for producing such composite film, and the application of the composite film in curtains and composite fabrics. The composite film includes light-reflective resin regions and a light-absorptive resin region, the light-absorptive resin region is located between the light-reflective resin regions such that they are formed into an integrated composite structure. The integrated composite structure is formed by one-time extrusion molding. The composite film of the present disclosure has advantages such as a thin film thickness, high strength and a good shading effect. The fabric and the shading curtain made of the composite film have the characteristics of being highly shading, lightweight and durable, easy to be produced and the like.
    Type: Application
    Filed: April 5, 2017
    Publication date: June 14, 2018
    Inventors: Limin CHEN, Hongqiao Qiu
  • Patent number: 9574694
    Abstract: An evaporator cuff for use with a pipe freezer apparatus. The evaporator cuff includes a hose connector attached to an evaporator body. The evaporator body has an inner wall configured to engage the outer surface of a pipe, an outer wall spaced apart from the inner wall. A chamber is defined between the inner and outer walls, first and second side walls, and first and second end walls. A plurality of baffles are located in the chamber and arranged to define a series of conduits for creating a flow path through the chamber for refrigerant to flow along. The walls are arranged so as to form a serpentine flow path from the evaporator inlet to the evaporator outlet.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: February 21, 2017
    Assignee: Spectronics Corporation
    Inventor: Limin Chen
  • Publication number: 20160040818
    Abstract: An evaporator cuff for use with a pipe freezer apparatus. The evaporator cuff includes a hose connector attached to an evaporator body. The evaporator body has an inner wall configured to engage the outer surface of a pipe, an outer wall spaced apart from the inner wall. A chamber is defined between the inner and outer walls, first and second side walls, and first and second end walls. A plurality of baffles are located in the chamber and arranged to define a series of conduits for creating a flow path through the chamber for refrigerant to flow along. The walls are arranged so as to form a serpentine flow path from the evaporator inlet to the evaporator outlet.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 11, 2016
    Applicant: Spectronics Corporation
    Inventor: Limin Chen
  • Patent number: 8794644
    Abstract: A side-rollable log cart is invented to load and unload huge logs and remove such logs from a confined location. It also disclosed a method to load a large and heavy log onto the cart by laying down one side of the log cart and dragging such log with standard peavey tool by two men.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 5, 2014
    Inventors: Limin Chen, Daniel Charles Massaro
  • Publication number: 20140145407
    Abstract: A side-rollable log cart is invented to load and unload huge logs and remove such logs from a confined location. It also disclosed a method to load a large and heavy log onto the cart by laying down one side of the log cart and dragging such log with standard peavey tool by two men.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 29, 2014
    Inventors: Limin Chen, Daniel Charles Massaro
  • Patent number: 8091876
    Abstract: Generally, a fixture for securing optoelectronic packages may be used to secure one or more optoelectronic packages for mounting one or more components and/or one or more wires to at least first and second mounting surfaces at different relative angles. The fixture is rotatable between at least first and second mounting positions with a top surface of the fixture being at respective first and second mounting angles relative to a horizontal plane. The fixture may be configured to secure the optoelectronic package(s) for positioning at different mounting angles to facilitate mounting the components and/or wires to the mounting surfaces at the different angles. The fixture may also be configured to be continuously adjustable over a range of angles between the first and second mounting angles.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: January 10, 2012
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Kai-Sheng Lin, Chian-Hung Chen, Limin Chen
  • Publication number: 20100008093
    Abstract: Generally, a fixture for securing optoelectronic packages may be used to secure one or more optoelectronic packages for mounting one or more components and/or one or more wires to at least first and second mounting surfaces at different relative angles. The fixture is rotatable between at least first and second mounting positions with a top surface of the fixture being at respective first and second mounting angles relative to a horizontal plane. The fixture may be configured to secure the optoelectronic package(s) for positioning at different mounting angles to facilitate mounting the components and/or wires to the mounting surfaces at the different angles. The fixture may also be configured to be continuously adjustable over a range of angles between the first and second mounting angles.
    Type: Application
    Filed: July 10, 2008
    Publication date: January 14, 2010
    Applicant: APPLIED OPTOELECTRONICS, INC.
    Inventors: Kai-Sheng Lin, Chian-Hung Chen, Limin Chen
  • Patent number: 7519260
    Abstract: An optoelectronic device separation apparatus may include a first and second clamp members configured to grip coaxial portions of an optoelectronic device. In one embodiment, the clamp members grip a housing portion and a fiber pigtail portion, respectively. The clamp members are configured to rotate relative to each other about an axis that is generally coaxial with the axis of the coaxial portions of the optoelectronic device. A force may be applied to the clamp members to provide such rotation, thereby causing the coaxial portions of the optoelectronic device to separate, for example, along weld points coupling the portions of the optoelectronic device together. Of course, many alternatives, variations and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: April 14, 2009
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Kai-Sheng Lin, Chung-Yung Wang, Hung-Lun Chang, Limin Chen, Chian-Hung Chen