Patents by Inventor Xuefeng Ma

Xuefeng Ma 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).

  • Patent number: 11378538
    Abstract: A water detection device (100) may have a water sensor on both a top and bottom of the device. A water sensor circuit (1004,1006,1100, 1101) may be configured to detect water by delivering a signal may be delivered to an electrical contact (1104, 1132), and the presence of water may be determined based upon detection of the signal at the other contact (1106, 1134). The water sensor circuit device (1101) may be configured with a comparator (1116) that uses hysteresis to provide sensitivity to the presence or absence of water. In a battery-powered water sensor, the water detection signal may be delivered as an alternating signal using, e.g., a signal modulator circuit (e.g., an oscillator circuit (1114) and gate (1120) optionally coupled to a wake-sleep controller (1112)) that is coupled to a battery (133), which may avoid oxidation or other forms of ionic corrosion. In some examples, a water detection signal may be recurrently delivered to the first contact (1132) to conserve battery power.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: July 5, 2022
    Assignee: Nortek Security & Control LLC
    Inventors: Ming Chuan Lee, Xuefeng Ma, Jian Hua Liu, Jian Hong Yin
  • Publication number: 20220113774
    Abstract: An apparatus is described. The apparatus includes an add-in card having a power connector to receive power other than through the add-in card's host connector. The power connector fitted in a notch of a printed circuit board of the add-in card so that, when the printed circuit board is oriented to have an upper surface with semiconductor chips disposed thereon, an upper surface of the connector is above the upper surface of the printed circuit board and a lower surface of the connector is below a lower surface of the printed circuit board.
    Type: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Inventors: Shahin AMIRI, Mirui WANG, Evan PANG, Robert SCHUM, Shahed SAFAVI-BAYAT, Xuefeng MA, Jason LEE PACK, Yvan LARGE
  • Publication number: 20200264120
    Abstract: A water detection device (100) may have a water sensor on both a top and bottom of the device. A water sensor circuit (1004,1006,1100, 1101) may be configured to detect water by delivering a signal may be delivered to an electrical contact (1104, 1132), and the presence of water maybe determined based upon detection of the signal at the other contact (1106, 1134). The water sensor circuit device (1101) may be configured with a comparator (1116) that uses hysteresis to provide sensitivity to the presence or absence of water. In a battery-powered water sensor, the water detection signal may be delivered as an alternating signal using, e.g., a signal modulator circuit (e.g., an oscillator circuit(1114) and gate (1120) optionally coupled to a wake-sleep controller (1112)) that is coupled to a battery (133), which may avoid oxidation or other forms of ionic corrosion. In some examples, a water detection signal may be recurrently delivered to the first contact (1132) to conserve battery power.
    Type: Application
    Filed: September 28, 2017
    Publication date: August 20, 2020
    Inventors: Ming Chuan Lee, Xuefeng Ma, Jian Hua Liu, Jian Hong Yin
  • Patent number: 9193967
    Abstract: Provided are a PEGylated analogue protein of canine urate oxidase, preparation method and use thereof. The analogue protein of canine urate oxidase is a canine urate oxidase, or a chimeric protein comprising part of the amino acid sequence of a canine urate oxidase and part of the amino acid sequence of a human urate oxidase, or a mutant protein thereof. The PEGylated analogue protein of canine urate oxidase and pharmaceutical compositions thereof according to the present invention can be used for the prevention and/or treatment of hyperuricemia and chronic gout.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: November 24, 2015
    Inventors: Chun Zhang, Kai Fan, Xuefeng Ma, Li Yang, Chunlan Hu, Hua Luo, Xiang Mei
  • Publication number: 20140065123
    Abstract: Provided are a PEGylated analogue protein of canine urate oxidase, preparation method and use thereof. The analogue protein of canine urate oxidase is a canine urate oxidase, or a chimeric protein comprising part of the amino acid sequence of a canine urate oxidase and part of the amino acid sequence of a human urate oxidase, or a mutant protein thereof. The PEGylated analogue protein of canine urate oxidase and pharmaceutical compositions thereof according to the present invention can be used for the prevention and/or treatment of hyperuricemia and chronic gout.
    Type: Application
    Filed: February 14, 2012
    Publication date: March 6, 2014
    Applicant: Chongqing Fagen Biomedical Inc. No. 80 4th Street Keyuan
    Inventors: Chun Zhang, Kai Fan, Xuefeng Ma, Li Yang, Chunlan Hu, Hua Luo, Xiang Mei
  • Patent number: 8586535
    Abstract: The present invention provides a humanized recombinant uricase and mutants thereof, wherein the humanized recombinant uricase is a chimeric protein which comprises amino acids of non-human mammal uricase and amino acids of human uricase. The humanized recombinant unease and mutants thereof have reduced immunogenicity in human, and can be used for the treatment of hyperuricemia and gout.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: November 19, 2013
    Assignee: Chongqing Fagen Biomedical Inc.
    Inventors: Kai Fan, Chun Zhang, Xuefeng Ma, Xiang Mei, Chunlan Hu
  • Publication number: 20120269795
    Abstract: The present invention provides a humanized recombinant uricase and mutants thereof, wherein the humanized recombinant uricase is a chimeric protein which comprises amino acids of non-human mammal uricase and amino acids of human uricase. The humanized recombinant unease and mutants thereof have reduced immunogenicity in human, and can be used for the treatment of hyperuricemia and gout.
    Type: Application
    Filed: March 12, 2010
    Publication date: October 25, 2012
    Applicant: Congqing Fagen Biomedical Inc.
    Inventors: Kai Fan, Chun Zhang, Xuefeng Ma, Xiang Mei, Chunlan Hu
  • Patent number: D851526
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: June 18, 2019
    Assignee: Nortek Security & Control LLC
    Inventors: Ming Chuan Lee, Xuefeng Ma, Jian Hua Liu, Jian Hong Yin