Patents by Inventor Hongdong Liu

Hongdong 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).

  • Methods for spherically granulating and agglomerating metal particles, and the metal particles prepared thereby, anodes made from the metal patricles
    Patent number: 7666247
    Abstract: A method for spherically granulating and agglomerating metal particles such as tantalum and/or niobium powders is described in the present invention, which includes the steps of: a). comminuting the metal particles to form fine particles having D50 less than 50 ?m; b). granulating the comminuted metal particles comprising volatile liquid, for example, tantalum and/or niobium particles comprising volatile liquid, to form wet spherical particles; c). still drying the wet spherical particles and removing volatile liquid to form flowable pre-agglomerated particles with increased bulk density; d). heat treating the pre-agglomerated particles; e). screening the heat treated powder to obtain the flowable agglomerated particles. The present invention provides a flowable spherical agglomerated metal particles, and especially tantalum and/or niobium particles having improved properties. The present agglomerated tantalum powder have a flow rate of at least about 2.0 g/sec, a BET surface area of from about 0.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: February 23, 2010
    Assignee: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Jilin He, Luntao Pan, Aiguo Zheng, Yuewei Cheng, Yuezhong Ma, Hongdong Liu, Guoqi Yang, Chunxiang Wang, Yanping Wang, Shiping Zheng
  • METHODS FOR SPHERICALLY GRANULATING AND AGGLOMERATING METAL PARTICLES, AND THE METAL PARTICLES PREPARED THEREBY, ANODES MADE FROM THE METAL PARTICLES
    Publication number: 20070193409
    Abstract: A method for spherically granulating and agglomerating metal particles such as tantalum and/or niobium powders is described in the present invention, which includes the steps of: a). comminuting the metal particles to form fine particles having D50 less than 50 ?m; b). granulating the comminuted metal particles comprising volatile liquid, for example, tantalum and/or niobium particles comprising volatile liquid, to form wet spherical particles; c). still drying the wet spherical particles and removing volatile liquid to form flowable pre-agglomerated particles with increased bulk density; d). heat treating the pre-agglomerated particles; e). screening the heat treated powder to obtain the flowable agglomerated particles. The present invention provides a flowable spherical agglomerated metal particles, and especially tantalum and/or niobium particles having improved properties. The present agglomerated tantalum powder have a flow rate of at least about 2.0 g/sec, a BET surface area of from about 0.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 23, 2007
    Applicant: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Jilin He, Luntao Pan, Aiguo Zheng, Yuewei Cheng, Yuezhong Ma, Hongdong Liu, Guoqi Yang, Chunxiang Wang, Yanping Wang, Shiping Zheng
  • Methods for spherically granulating and agglomerating metal particles, and the metal particles prepared thereby, anodes made from the metal particles
    Publication number: 20070068341
    Abstract: A method for spherically granulating and agglomerating metal particles such as tantalum and/or niobium powders is described in the present invention, which includes the steps of: a). comminuting the metal particles to form fine particles having D50 less than 50 ?m; b). granulating the comminuted metal particles comprising volatile liquid, for example, tantalum and/or niobium particles comprising volatile liquid, to form wet spherical particles; c). still drying the wet spherical particles and removing volatile liquid to form flowable pre-agglomerated particles with increased bulk density; d). heat treating the pre-agglomerated particles; e). screening the heat treated powder to obtain the flowable agglomerated particles. The present invention provides a flowable spherical agglomerated metal particles, and especially tantalum and/or niobium particles having improved properties. The present agglomerated tantalum powder have a flow rate of at least about 2.0 g/sec, a BET surface area of from about 0.
    Type: Application
    Filed: February 17, 2006
    Publication date: March 29, 2007
    Applicant: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Yuewei Cheng, Yuezhong Ma, Hongdong Liu, Guoqi Yang, Chunxiang Wang, Yanping Wang, Shiping Zheng