Patents by Inventor David Togami

David Togami 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).

  • Process for performing polynucleotide separations
    Publication number: 20030057154
    Abstract: The invention recognizes the deleterious effects of trace, and even undetectable amounts of multivalent cations on the separation of mixtures of polynucleotides, especially double stranded polynucleotides, and provides an improved method for separating such mixtures on wide pore, non-polar separation media by eliminating multivalent cations from the all aspects of the separation process. This is accomplished by using components in the separation process which are materials which do not release metal cations. In addition, the use of cation capture resins and other methods to remove residual traces of multivalent cations from eluting solvents, sample solutions, separation media, and system components is described. It is also important to remove any traces or organic contaminants from solvents solutions and system parts.
    Type: Application
    Filed: October 28, 2002
    Publication date: March 27, 2003
    Applicant: Transgenomic, Inc.
    Inventors: Douglas T. Gjerde, Robert M. Haefele, David Togami
  • Process for performing polynucleotide separations
    Patent number: 6471866
    Abstract: The invention recognizes the deleterious effects of trace, and even undetectable amounts of multivalent cations on the separation of mixtures of polynucleotides, especially double stranded polynucleotides, and provides an improved method for separating such mixtures on wide pore, non-polar separation media by eliminating multivalent cations from the all aspects of the separation process. This is accomplished by using components in the separation process which are materials which do not release metal cations. In addition, the use of cation capture resins and other methods to remove residual traces of multivalent cations from eluting solvents, sample solutions, separation media, and system components is described. It is also important to remove any traces or organic contaminants from solvents solutions and system parts.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: October 29, 2002
    Assignee: Transgenomic, Inc.
    Inventors: Douglas T. Gjerde, Robert M. Haefele, David Togami