Patents by Inventor Yafei Liu

Yafei Liu 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).

  • Soil property test device
    Patent number: 9453829
    Abstract: A test device including a closeable cavity and a water flow groove with a water transmission channel existing between the water flow groove and the internal part of the cavity. The water flow groove includes a water inlet and a water outlet with the depth of the water inlet being greater than the depth of the water outlet. Simultaneously, side lead-in pipe of drain pipe and elbow pipe on side wall of water inlet pipe are consistent with height of top surface of the ceramic plate, making hydraulic pressure of tested soil sample being zero during dehydrating and soaking process capable of ensuring accuracy of test result. A necking design is applied to reduce water evaporation in the drainage pipe and lower the test errors. Side lead-in pipe is connected with drainage pipe for smoothly draining water and also can prevent air reversely flowing and entering into the base.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: September 27, 2016
    Assignee: SHIJIAZHUANG TIEDAO UNIVERSITY
    Inventors: Huaiping Feng, Jianmei Chang, Tielin Li, Yanjie Lin, Chaoliang Ye, Tianliang Wang, Zhipeng Wang, Yafei Liu
  • TEST DEVICE
    Publication number: 20150377853
    Abstract: A test device including a closeable cavity and a water flow groove with a water transmission channel existing between the water flow groove and the internal part of the cavity. The water flow groove includes a water inlet and a water outlet with the depth of the water inlet being greater than the depth of the water outlet. Simultaneously, side lead-in pipe of drain pipe and elbow pipe on side wall of water inlet pipe are consistent with height of top surface of the ceramic plate, making hydraulic pressure of tested soil sample being zero during dehydrating and soaking process capable of ensuring accuracy of test result. A necking design is applied to reduce water evaporation in the drainage pipe and lower the test errors. Side lead-in pipe is connected with drainage pipe for smoothly draining water and also can prevent air reversely flowing and entering into the base.
    Type: Application
    Filed: December 22, 2014
    Publication date: December 31, 2015
    Applicant: SHIJIAZHUANG TIEDAO UNIVERSITY
    Inventors: Huaiping FENG, Jianmei CHANG, Tielin LI, Yanjie LIN, Chaoliang YE, Tianliang WANG, Zhipeng WANG, Yafei LIU
  • Bisulfite Conversion Reagent
    Publication number: 20100112595
    Abstract: Disclosed, among other things, are packaged bisulfite solutions comprising bisulfite reagent in an oxygen-impermeable container and methods.
    Type: Application
    Filed: January 13, 2010
    Publication date: May 6, 2010
    Applicant: LIFE TECHNOLOGIES CORPORATION
    Inventors: Yafei LIU, Haley O. FISKE, Steven M. MENCHEN
  • Bisulfite conversion reagent
    Patent number: 7658288
    Abstract: Disclosed, among other things, are packaged bisulfite solutions comprising bisulfite reagent in an oxygen-impermeable container and methods.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: February 9, 2010
    Assignee: Applied Biosystems, LLC
    Inventors: Yafei Liu, Haley O. Fiske, Steven M. Menchen
  • Bisulfite conversion reagent
    Publication number: 20060148853
    Abstract: Disclosed, among other things, are packaged bisulfite solutions comprising bisulfite reagent in an oxygen-impermeable container and methods.
    Type: Application
    Filed: November 8, 2005
    Publication date: July 6, 2006
    Applicant: Applera Corporation
    Inventors: Yafei Liu, Haley Fiske, Steven Menchen