Patents by Inventor Jeff Duan

Jeff 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).

  • Centrifugal compressor with casing treatment for surge control
    Patent number: 9726185
    Abstract: A centrifugal compressor for compressing a fluid comprises a compressor wheel having a plurality of circumferentially spaced blades, and a compressor housing in which the compressor wheel is mounted. The compressor housing includes an inlet duct through which the fluid enters in an axial direction and is led by the inlet duct into the compressor wheel, and a wheel shroud located radially adjacent the tips of the blades. The wheel shroud has a port for bleeding off a portion of air flowing through the compressor. The bleed air enters an annular space, flows forward, and is injected back into the inlet flow through a plurality of circumferentially spaced slots defined through the wheel shroud. The slots are open at a leading edge of the wheel shroud.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: August 8, 2017
    Assignee: Honeywell International Inc.
    Inventors: Hua Chen, Vai Man Lei, Mike Gu, Catherine Yao, Jeff Duan
  • Centrifugal Compressor With Casing Treatment For Surge Control
    Publication number: 20140341727
    Abstract: A centrifugal compressor for compressing a fluid comprises a compressor wheel having a plurality of circumferentially spaced blades, and a compressor housing in which the compressor wheel is mounted. The compressor housing includes an inlet duct through which the fluid enters in an axial direction and is led by the inlet duct into the compressor wheel, and a wheel shroud located radially adjacent the tips of the blades. The wheel shroud has a port for bleeding off a portion of air flowing through the compressor. The bleed air enters an annular space, flows forward, and is injected back into the inlet flow through a plurality of circumferentially spaced slots defined through the wheel shroud. The slots are open at a leading edge of the wheel shroud.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Applicant: Honeywell International Inc.
    Inventors: Hua Chen, Vai Man Lei, Mike Gu, Catherine Yao, Jeff Duan
  • Cytokine inhibitors
    Patent number: 7868001
    Abstract: A compound of Formula I: Each variable is defined in the specification. This invention relates to a method of decreasing a level of a cytokine (e.g., TNF? or interlukine such as IL-1?) in a subject with a compound of Formula I. It also relates to a method of treating a disorder mediated by an overproduction of a cytokine with such a compound.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: January 11, 2011
    Assignee: Hutchison Medipharma Enterprises Limited
    Inventors: Wei Deng, Wei-Guo Su, Yu Cai, Jeff Duan
  • Andrographolide and analogues as inhibitors of TNF? and IL-1? expression
    Patent number: 7625945
    Abstract: This invention relates to a method of inhibiting the expression of TNF? or IL-1? with a compound of the following formula: wherein R1 and R2 are defined herein. It also relates to is a method of treating inflammatory bowel disease with such a compound.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: December 1, 2009
    Assignee: Hutchison MediPharma Enterprises Ltd.
    Inventors: Xiaoqiang Yan, Tao Wang, Zhiming Ma, Ke Pan, Weihan Zhang, Jianrong Hong, Jeff Duan, Yu Cai
  • CYTOKINE INHIBITORS
    Publication number: 20090118292
    Abstract: A compound of Formula I: Each variable is defined in the specification. This invention relates to a method of decreasing a level of a cytokine (e.g., TNF? or interlukine such as IL-1?) in a subject with a compound of Formula I. It also relates to a method of treating a disorder mediated by an overproduction of a cytokine with such a compound.
    Type: Application
    Filed: November 2, 2007
    Publication date: May 7, 2009
    Applicant: Hutchison Medipharma Enterprises Limited
    Inventors: Wei Deng, Wei-Guo Su, Yu Cai, Jeff Duan
  • Extract of sophora flavescens flavonoids and uses thereof
    Publication number: 20050226943
    Abstract: Compositions containing a Sophora flavescens flavonoids extract or its active ingredients, Kurarinone, 2?-methoxy-Kurarinone, and Sophoraflavanone G are described. Also disclosed is a method of treating TNF? and IL-1? related diseases using such compositions.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 13, 2005
    Inventors: Xiaoqiang Yan, Yumin Cui, Tao Wang, Zhiming Ma, Ke Pan, Weihan Zhang, Weihui Huang, Jianrong Hong, Jeff Duan, Yu Cai
  • Andrographolide and analogues as inhibitors of TNFalpha and IL-1beta expression
    Publication number: 20050215628
    Abstract: This invention relates to a method of inhibiting the expression of TNF? or IL-1? with a compound of the following formula: wherein R1 and R2 are defined herein. It also relates to is a method of treating inflammatory bowel disease with such a compound.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 29, 2005
    Inventors: Xiaoqiang Yan, Tao Wang, Zhiming Ma, Ke Pan, Weihan Zhang, Jianrong Hong, Jeff Duan, Yu Cai