Patents by Inventor Xiao-Ping Dai

Xiao-Ping Dai 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: 20180289802
    Abstract: Provided herein are formulations comprising antibodies that specifically bind to Programmed Death-1 (PD-1) and methods of making such formulations.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 11, 2018
    Inventors: Douglas Banks, Xiao-Ping Dai, Willard R. Foss
  • Publication number: 20170327558
    Abstract: The present invention describes methods and processes for the production of proteins by animal cell or mammalian cell culture. In one aspect, the methods comprise the growth of cells in a growth factor/protein/peptide free medium. In another aspect, the methods comprise the addition of growth factors during the production phase. The methods sustain a high viability of the cultured cells, and can yield an increased end titer of protein product, and a high quality of protein product.
    Type: Application
    Filed: July 31, 2017
    Publication date: November 16, 2017
    Inventors: Jun Tian, Michael Borys, Zhengjian Li, Nicholas Abuabsi, Angela Au, Nan-xin Qian, Xiao-ping Dai
  • Publication number: 20140302581
    Abstract: The present invention provides a method of increasing protein production in a cell culture by growing cells that produce the protein (e.g., the growth phase) in a perfusion cell culture to a high cell density (i.e., at least above about 40×106 cells/mL) and then switching to a protein production phase, wherein the cells are cultured in a fed-batch cell culture. The present invention further provides a method for clarifying a protein from a cell culture by adjusting the pH of the cell culture to below neutral pH (i.e., below a pH of 7) and settling the cell culture, such that the cell culture separates to form a supernatant layer and a cell-bed layer, wherein the protein is in the supernatant layer.
    Type: Application
    Filed: June 19, 2014
    Publication date: October 9, 2014
    Inventors: Alahari Arunakumari, Xiao-Ping Dai, Javier Garcia, Richard P. Martel
  • Patent number: 8765415
    Abstract: The present invention provides a method of increasing protein production in a cell culture by growing cells that produce the protein (e.g., the growth phase) in a perfusion cell culture to a high cell density (i.e., at least above about 40×106 cells/N mL) and then switching to a protein production phase, wherein the cells are cultured in a fed-batch cell culture. The present invention further provides a method for clarifying a protein from a cell culture by adjusting the pH of the cell culture to below neutral pH (i.e., below a pH of 7) and settling the cell culture, such that the cell culture separates to form a supernatant layer and a cell-bed layer, wherein the protein is in the supernatant layer.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: July 1, 2014
    Assignee: Medarex, L.L.C.
    Inventors: Alahari Arunakumari, Xiao-Ping Dai, Javier Garcia, Richard P. Martel
  • Publication number: 20140106405
    Abstract: The present invention describes methods and processes for the production of proteins by animal cell or mammalian cell culture. In one aspect, the methods comprise the growth of cells in a growth factor/protein/peptide free medium. In another aspect, the methods comprise the addition of growth factors during the production phase. The methods sustain a high viability of the cultured cells, and can yield an increased end titer of protein product, and a high quality of protein product.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 17, 2014
    Inventors: Jun Tian, Michael Borys, Zhengjian Li, Nicholas Abuabsi, Angela Au, Nan-xin Qian, Xiao-ping Dai
  • Publication number: 20130252327
    Abstract: Disclosed are methods relating to amplification and expression of a nucleic acid sequence encoding a polypeptide of interest in recombinant cells, and cell lines and polypeptides produced from such methods. The methods disclosed herein permit the amplification of cell lines that express a polypeptide of interest in a relatively short period of time through the use of a bioreactor.
    Type: Application
    Filed: January 14, 2013
    Publication date: September 26, 2013
    Applicant: Medarex, Inc.
    Inventors: Alahari Arunakumari, Xiao-Ping Dai, Haile Ghebramariam
  • Patent number: 8357514
    Abstract: Disclosed are methods relating to amplification and expression of a nucleic acid sequence encoding a polypeptide of interest in recombinant cells, and cell lines and polypeptides produced from such methods. The methods disclosed herein permit the amplification of cell lines that express a polypeptide of interest in a relatively short period of time through the use of a bioreactor.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 22, 2013
    Assignee: Medarex, Inc.
    Inventors: Alahari Arunakumari, Xiao-Ping Dai, Haile Ghebramariam
  • Publication number: 20130017577
    Abstract: The present invention provides a method of increasing protein production in a cell culture by growing cells that produce the protein (e.g., the growth phase) in a perfusion cell culture to a high cell density (i.e., at least above about 40×106 cells/N mL) and then switching to a protein production phase, wherein the cells are cultured in a fed-batch cell culture. The present invention further provides a method for clarifying a protein from a cell culture by adjusting the pH of the cell culture to below neutral pH (i.e., below a pH of 7) and settling the cell culture, such that the cell culture separates to form a supernatant layer and a cell-bed layer, wherein the protein is in the supernatant layer.
    Type: Application
    Filed: November 17, 2010
    Publication date: January 17, 2013
    Inventors: Alahari Arunakumari, Xiao-Ping Dai, Javier Garcia, Richard P. Martel
  • Publication number: 20100178673
    Abstract: Disclosed are methods relating to amplification and expression of a nucleic acid sequence encoding a polypeptide of interest in recombinant cells, and cell lines and polypeptides produced from such methods. The methods disclosed herein permit the amplification of cell lines that express a polypeptide of interest in a relatively short period of time through the use of a bioreactor.
    Type: Application
    Filed: March 27, 2008
    Publication date: July 15, 2010
    Inventors: Alahari Arunakumari, Xiao-Ping Dai
  • Patent number: 6986847
    Abstract: An apparatus and method for recovering bioproducts from a feed solution. In one embodiment, the apparatus includes a module housing, a membrane means disposed in the housing for filtering the bioproducts from the feed solution wherein a portion of the membrane means is coated with a polymeric coating, and an adsorbent bed disposed in the housing for retaining the bioproducts which permeate through the membrane, wherein the apparatus is adapted to allow fractionation and purification of the retained bioproducts from the bed by elution.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: January 17, 2006
    Assignee: New Jersey Institute of Technology
    Inventors: Kamalesh K. Sirkar, Robert G. Luo, Yanke Xu, Xiao-Ping Dai
  • Publication number: 20040069710
    Abstract: An apparatus and method for recovering bioproducts from a feed solution. In one embodiment, the apparatus includes a module housing, a membrane means disposed in the housing for filtering the bioproducts from the feed solution wherein a portion of the membrane means is coated with a polymeric coating, and an adsorbent bed disposed in the housing for retaining the bioproducts which permeate through the membrane, wherein the apparatus is adapted to allow fractionation and purification of the retained bioproducts from the bed by elution.
    Type: Application
    Filed: May 12, 2003
    Publication date: April 15, 2004
    Inventors: Kamalesh K. Sirkar, Robert G. Luo, Yanke Xu, Xiao-Ping Dai