Patents by Inventor Hao Duan

Hao Duan 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: 20220002530
    Abstract: Provided by the present invention is a high melt strength styrene resin composition. The composition includes the following components proportioned according to certain parts by weight: a styrene resin or a styrene alloy, a tackifier, an antioxidant and a lubricant. Compared to the existing technology, the present invention has the following beneficial effects: 1. a random copolymer used as the tackifier in the present invention is thermodynamically compatible with the styrene resin and the alloy thereof, does not experience phase separation, and has excellent mechanical properties; 2. the random copolymer used as the tackifier in the present invention has a moderate molecular weight, and is more easily plasticized than a rubber powder, a SAN powder having a high molecular weight, a heat-resistant powder, and so on, thus having better processability, uniform thickness, and low shrinkage rate, and not frequently experiencing the problem of surface defects.
    Type: Application
    Filed: September 21, 2018
    Publication date: January 6, 2022
    Inventors: Hao DUAN, Congshan ZHU, Junjie TANG
  • Patent number: 11162996
    Abstract: A probing apparatus includes a carrier having an opening, a supporter disposed on the carrier in a way that its bottom surface faces toward the carrier, its top surface for disposition of a wafer, and its light permeable portion allowing light to pass through the top and bottom surfaces corresponding in position to the opening, an air heating device having a covering plate and an air supply unit, and a probing device having a probe protruding out of the bottom surface of the air heating device. A thermal air source provides thermal air to a heating space between the bottom surface of the air heating device and the top surface of the supporter through an air supply passage of the air supply unit. The probing apparatus can test light emitting efficiency of a light emitting chip in the wafer and heat the chip at the same time.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: November 2, 2021
    Assignee: MPI CORPORATION
    Inventors: Wen Pin Chuang, Yi Ching Lo, Hao Duan
  • Publication number: 20210156903
    Abstract: A probing apparatus includes a carrier having an opening, a supporter disposed on the carrier in a way that its bottom surface faces toward the carrier, its top surface for disposition of a wafer, and its light permeable portion allowing light to pass through the top and bottom surfaces corresponding in position to the opening, an air heating device having a covering plate and an air supply unit, and a probing device having a probe protruding out of the bottom surface of the air heating device. A thermal air source provides thermal air to a heating space between the bottom surface of the air heating device and the top surface of the supporter through an air supply passage of the air supply unit. The probing apparatus can test light emitting efficiency of a light emitting chip in the wafer and heat the chip at the same time.
    Type: Application
    Filed: September 30, 2020
    Publication date: May 27, 2021
    Applicant: MPI CORPORATION
    Inventors: WEN PIN CHUANG, YI CHING LO, HAO DUAN
  • Patent number: 10998631
    Abstract: An antenna system is configured to transceive a wireless signal. The antenna system includes a first dipole antenna and a second dipole antenna. The first dipole antenna includes a first radiator, a second radiator, and a first feeding point. The second dipole antenna includes a third radiator, a fourth radiator, and a second feeding point. The first radiator and the third radiator have a notch facing towards a first direction. The second radiator and the fourth radiator have a notch facing towards a second direction inverse to the first direction. The first feeding point, disposed between the first radiator and the second radiator, is located on one side of the first dipole antenna adjacent to the second dipole antenna. The second feeding point, disposed between the third radiator and the fourth radiator, is located on one side of the second dipole antenna adjacent to the first dipole antenna.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: May 4, 2021
    Assignee: SERCOMM CORPORATION
    Inventor: Jhih-Hao Duan
  • Publication number: 20190252778
    Abstract: An antenna system is configured to transceive a wireless signal. The antenna system includes a first dipole antenna and a second dipole antenna. The first dipole antenna includes a first radiator, a second radiator, and a first feeding point. The second dipole antenna includes a third radiator, a fourth radiator, and a second feeding point. The first radiator and the third radiator have a notch facing towards a first direction. The second radiator and the fourth radiator have a notch facing towards a second direction inverse to the first direction. The first feeding point, disposed between the first radiator and the second radiator, is located on one side of the first dipole antenna adjacent to the second dipole antenna. The second feeding point, disposed between the third radiator and the fourth radiator, is located on one side of the second dipole antenna adjacent to the first dipole antenna.
    Type: Application
    Filed: January 31, 2019
    Publication date: August 15, 2019
    Inventor: Jhih-Hao DUAN
  • Publication number: 20160347989
    Abstract: Embodiments of the invention relate to a mixed bacteria producing surfactant and its screening method. According to at least one embodiment, there is provided a mixed bacteria producing biosurfactant composed of three kinds of strains: Pseudomonas stutzeri with preservation No. CCTCC AB 205091, Nocardioides ginsengagri with preservation No. CCTCC S2013441, and Bacillus licheniformis with preservation No. CCTCC AB 205141. The mixed bacteria is obtained by choosing the bacterial strain for oil production awaiting screening, activating and culturing it, getting the fermentation liquid in primary screen with blood plate method, and re-screening fermentation liquid in primary screen with oil drain method. This mixed bacteria synthesizes the advantages of the three strain, thus producing a biosurfactant to enhance oil recovery in the oilfield.
    Type: Application
    Filed: April 28, 2016
    Publication date: December 1, 2016
    Applicant: ZFA Technologies Inc.
    Inventor: Hao DUAN
  • Patent number: 7991510
    Abstract: Systems and methods for liquid flow sensing and control for use with a variety of different types of liquid flow measurement and control systems. The liquid flow sensor system senses a flow signal indicative of the flow rate of the liquid flowing in a sensor conduit and analyzes the flow signal to determine, by detecting characteristic changes in the signal, whether a bubble is present in the sensor conduit. Where the system determines that a bubble is present, it may generate an alarm signal indicative of the presence of the bubble. A flow control system incorporating the flow sensor as a feedback source may respond to the detection of a bubble by temporarily freezing the flow control parameters until the bubble has exited the sensor conduit. The flow control system can implement procedures for clearing a bubble from the sensor conduit where the system detects that the bubble has become stuck.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: August 2, 2011
    Assignee: Brooks Instrument, LLC
    Inventors: Hao Duan, Aaron S. Tint, Christophe Ellec
  • Publication number: 20090281671
    Abstract: Systems and methods for liquid flow sensing and control for use with a variety of different types of liquid flow measurement and control systems. The liquid flow sensor system senses a flow signal indicative of the flow rate of the liquid flowing in a sensor conduit and analyzes the flow signal to determine, by detecting characteristic changes in the signal, whether a bubble is present in the sensor conduit. Where the system determines that a bubble is present, it may generate an alarm signal indicative of the presence of the bubble. A flow control system incorporating the flow sensor as a feedback source may respond to the detection of a bubble by temporarily freezing the flow control parameters until the bubble has exited the sensor conduit. The flow control system can implement procedures for clearing a bubble from the sensor conduit where the system detects that the bubble has become stuck.
    Type: Application
    Filed: March 16, 2009
    Publication date: November 12, 2009
    Applicant: CELERITY, INC.
    Inventors: HAO DUAN, Aaron S. Tint, Christophe Ellec
  • Publication number: 20070191990
    Abstract: Systems and methods for liquid flow sensing and control for use with a variety of different types of liquid flow measurement and control systems. The liquid flow sensor system senses a flow signal indicative of the flow rate of the liquid flowing in a sensor conduit and analyzes the flow signal to determine, by detecting characteristic changes in the signal, whether a bubble is present in the sensor conduit. Where the system determines that a bubble is present, it may generate an alarm signal indicative of the presence of the bubble. A flow control system incorporating the flow sensor as a feedback source may respond to the detection of a bubble by temporarily freezing the flow control parameters until the bubble has exited the sensor conduit. The flow control system can implement procedures for clearing a bubble from the sensor conduit where the system detects that the bubble has become stuck.
    Type: Application
    Filed: August 11, 2006
    Publication date: August 16, 2007
    Inventors: Hao Duan, Aaron Tint, Christophe Ellec
  • Patent number: 7117104
    Abstract: An ultrasonic flow meter includes a conduit, a first ultrasonic transducer, a second ultrasonic transducer, and a controller. The first ultrasonic transducer is disposed at a first position about a first portion of the conduit to transmit a first ultrasonic signal and to receive a second ultrasonic signal. The second ultrasonic transducer is disposed at a second position about a second portion of the conduit that is spaced apart from the first position along a length of the conduit to transmit the second ultrasonic signal and to receive the first ultrasonic signal. The controller is configured to cross-correlate the first and second received ultrasonic signals and generate a resulting time-domain signal, analyze the resulting time-domain signal to determine a difference in transit time between the first and second received ultrasonic signals, and calculate a rate of flow of a fluid in the conduit based upon the determined difference.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: October 3, 2006
    Assignee: Celerity, Inc.
    Inventors: Nelson Urdaneta, Aaron S Tint, Hao Duan, Eric J Redemann, Christopher Andrew Wacinski
  • Publication number: 20050288873
    Abstract: An ultrasonic flow meter includes a conduit, a first ultrasonic transducer, a second ultrasonic transducer, and a controller. The first ultrasonic transducer is disposed at a first position about a first portion of the conduit to transmit a first ultrasonic signal and to receive a second ultrasonic signal. The second ultrasonic transducer is disposed at a second position about a second portion of the conduit that is spaced apart from the first position along a length of the conduit to transmit the second ultrasonic signal and to receive the first ultrasonic signal. The controller is configured to cross-correlate the first and second received ultrasonic signals and generate a resulting time-domain signal, analyze the resulting time-domain signal to determine a difference in transit time between the first and second received ultrasonic signals, and calculate a rate of flow of a fluid in the conduit based upon the determined difference.
    Type: Application
    Filed: June 28, 2004
    Publication date: December 29, 2005
    Inventors: Nelson Urdaneta, Aaron Tint, Hao Duan, Eric Redemann, Christopher Wacinski