Patents by Inventor Yen-Sheng Ho

Yen-Sheng Ho 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).

  • Method for manufacturing diethylene triamine pentaacetic acid derivative
    Patent number: 7767844
    Abstract: The present invention at first prepares a penta-alkyl DTPA and then processes a regioselective hydrolysis over the penta-alkyl DTPA while using a metal ion as a catalyst to obtain a tetra-alkyl DTPA, where, by the above two steps, a monoreactive DTPA derivative is manufactured.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: August 3, 2010
    Assignee: Atomic Energy Council
    Inventors: Te-Wei Lee, Chia-Hsi Yang, Yen-Sheng Ho, Li-Hui Lu, Shu-Ling Chen
  • Method for manufacturing diethylene triamine pentaacetic acid derivative
    Publication number: 20060264669
    Abstract: The present invention at first prepares a penta-alkyl DTPA and then processes a regioselective hydrolysis over the penta-alkyl DTPA while using a metal ion as a catalyst to obtain a tetra-alkyl DTPA, where, by the above two steps, a monoreactive DTPA derivative is manufactured.
    Type: Application
    Filed: May 23, 2005
    Publication date: November 23, 2006
    Inventors: Te-Wei Lee, Chia-Hsi Yang, Yen-Sheng Ho, Li-Hui Lu, Shu-Ling Chen