Patents by Inventor Mark Levenstein

Mark Levenstein 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).

  • Cultivation Of Primate Embryonic Stem Cells
    Publication number: 20120178160
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferrin, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Application
    Filed: February 17, 2012
    Publication date: July 12, 2012
    Applicant: WiCell Research Institute, Inc.
    Inventors: James A. Thomson, Mark Levenstein, Ren-He Xu
  • Cultivation of Primate Embryonic Stem Cells
    Publication number: 20100173410
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferrin, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Application
    Filed: June 23, 2009
    Publication date: July 8, 2010
    Applicant: WiCell Research Institute, Inc.
    Inventors: James A. Thomson, Mark Levenstein, Ren-He Xu
  • Cultivation of Primate Embryonic Cells
    Publication number: 20090023208
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferring, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Application
    Filed: September 29, 2008
    Publication date: January 22, 2009
    Inventors: James A. Thomson, Mark Levenstein
  • Cultivation of human embryonic stem cells in the absence of feeder cells or without conditioned medium
    Patent number: 7439064
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferring, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: October 21, 2008
    Assignee: Wicell Research Institute, Inc.
    Inventors: James A. Thomson, Mark Levenstein
  • Cultivation of primate embryonic stem cells
    Publication number: 20050244962
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferring, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Application
    Filed: March 11, 2005
    Publication date: November 3, 2005
    Inventors: James Thomson, Mark Levenstein
  • Cultivation of primate embryonic stem cells
    Publication number: 20050148070
    Abstract: The invention relates to methods for culturing human embryonic stem cells by culturing the stem cells in an environment essentially free of mammalian fetal serum and in a stem cell culture medium including amino acids, vitamins, salts, minerals, transferring, insulin, albumin, and a fibroblast growth factor that is supplied from a source other than just a feeder layer the medium. Also disclosed are compositions capable of supporting the culture and proliferation of human embryonic stem cells without the need for feeder cells or for exposure of the medium to feeder cells.
    Type: Application
    Filed: September 28, 2004
    Publication date: July 7, 2005
    Inventors: James Thomson, Mark Levenstein