Patents by Inventor Wen-Qing Xu

Wen-Qing Xu 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).

  • Structured boehmite pigment and method for making same
    Patent number: 6413308
    Abstract: A structured boehmite pigment which comprises a plurality of alumina monohydrate particles. The pigment is particularly useful as a flatting pigment in paint and as an anti-block agent in plastic film. The boehmite pigment has an aggregate median particle size of about 8 to about 30 microns; a total pore volume of at least about 0.8 ml/g; a differential pore volume of less than about 0.3 ml/g; an oil absorption of about 70 to about 135 m/g; a BET surface area of about 3 to about 20 m2/g, and a TAPPI brightness of at least about 90.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: July 2, 2002
    Assignee: J. M. Huber Corporation
    Inventors: Wen-Qing Xu, Gary M. Freeman
  • Dehydrogenation of N-paraffin to N-olefin employing manganese oxide octahedral molecular sieve as catalyst
    Patent number: 5597944
    Abstract: The dehydrogenation of n-parrofins to n-olefins is catalyzed by novel synthetic manganese oxide octahedral molecular sieves such as OMS-1 and OMS-2.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: January 28, 1997
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Robert A. Sawicki, Yuan-Gen Yin, Wen-Qing Xu, Steven L. Suib