Patents by Inventor Elisha R. Oguri

Elisha R. Oguri 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).

  • Identification and quantitative determination of major chemical contaminants associated with L-Tryptophan
    Patent number: 8062899
    Abstract: An improved chromatographic method for the separation, identification and quantification of contaminants associated with Eosinophelia-Myalgia Syndrome (EMS) includes a high pressure liquid chromatography (HPLC) method which utilizes a silica-based column and a gradient mobile phase. The method provides for effective, efficient, and economical quantitative and qualitative identification of 1,1?-Ethylidenebis L-tryptophan (EBT), 2,3-indolymethyl L-tryptophan (Peak 200), and 2-anilino-L-alanine (Peak 1).
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 22, 2011
    Assignee: NHK Laboratories, Inc.
    Inventor: Elisha R. Oguri