Patents by Inventor CHENG-FENG HSU

CHENG-FENG HSU 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: 20170115259
    Abstract: A high performance liquid chromatography method of an imaging agent, a precursor of the imaging agent, or an intermediate of the imaging agent is revealed. Instead of using the same eluent, a first eluent with a lower proportion of methanol is used to elute target compounds. Then a second eluent having a higher ratio of methanol ranging from 95-99% is used to elute for at least 15 minutes. Next use the first eluent again to elute for at least 60 minutes. Thus the target compounds are retained stably in the column and retention time of respective reproductive characteristic peak is obtained.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 27, 2017
    Inventors: KUEI-LIN LU, JHE-YU LIU, YU CHANG, CHENG-FENG HSU