Patents by Inventor Guang Q. Li

Guang Q. Li 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).

  • Polar-modified bonded phase materials for chromatographic separations
    Patent number: 8702988
    Abstract: Novel compositions are disclosed for use as a stationary phase in chromatography comprising an inorganic substrate that is modified with at least one silane having the formula R1?-Q?-(CH2)?SiR2?X3-?. In a preferred embodiment, the inorganic substrate is silica gel and is modified with at least two silanes. Methods of preparation and use in chromatographic applications are disclosed. The novel compositions provide superior chromatographic performance, reduced silanol activity, enhanced stability, and reproducibility in preparation and performance.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: April 22, 2014
    Assignee: Agilent Technologies, Inc.
    Inventor: Guang Q. Li
  • Polar-modified bonded phase materials for chromatographic separations
    Patent number: 7125488
    Abstract: Novel compositions are disclosed for use as a stationary phase in chromatography comprising an inorganic substrate that is modified with at least one silane having the formula R1?-Q?-(CH2)?SiR2?X3-?. In a preferred embodiment, the inorganic substrate is silica gel and is modified with at least two silanes. Methods of preparation and use in chromatographic applications are disclosed. The novel compositions provide superior chromatographic performance, reduced silanol activity, enhanced stability, and reproducibility in preparation and performance.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: October 24, 2006
    Assignee: Varian, Inc.
    Inventor: Guang Q. Li