Patents by Inventor Zhiquan Q. Yan

Zhiquan Q. Yan 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).

  • Hermetically Sealed Paperboard Container
    Publication number: 20120298733
    Abstract: A hermetically-sealed paperboard container is disclosed that may be produced using a conventional converting machine but at a converting temperature of at least 93° C. lower than a conventional converting temperature. The formation of pin holes or rupture on the barrier structure during the converting process can be significantly reduced, resulting in the hermetically-sealed paperboard container with enhanced barrier performances.
    Type: Application
    Filed: August 6, 2012
    Publication date: November 29, 2012
    Inventors: Qihua Xu, Todd Huffman, Timothy McLaughlin, Zhiquan Q. Yan
  • Preparation of high activity, high density activated carbon with activatable binder
    Patent number: 5538932
    Abstract: An improved method of manufacturing hard activated carbon pellets is disclosed in which a lignocellulose material is chemically activated to form a char and heated to a temperature above about 360.degree. C. which char is ground and then agglomerated in a pin mixer followed by pelleting the agglomerated acid char in the presence of an activatable binder. The pelleted hard activated carbon is then subjected to a final heat activation to yield a product with high density and activity.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: July 23, 1996
    Assignee: Westvaco Corporation
    Inventors: Zhiquan Q. Yan, John C. McCue, Edward D. Tolles
  • Method of preparation of gasoline vapor adsorptive activated carbon
    Patent number: 5324703
    Abstract: A method of manufacturing hard pelleted activated carbon is disclosed in which pellets are first formed by agglomeration in a pin mixer followed by pelleting the plasticized acid char (without the use of additional binders), and then activating the carbon pellets to yield a product with high density and activity.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: June 28, 1994
    Assignee: Westvaco Corporation
    Inventors: John C. McCue, Zhiquan Q. Yan, Edward D. Tolles
  • Preparation of high activity, high density activated carbon
    Patent number: 5250491
    Abstract: Lignocellulosic carbonaceous material is activated to produce a high activity, high density gas-phase activated carbon under conditions which effectively alter the particle pore volume size distribution to optimize the carbon's mesoporosity. An agglomeration process is disclosed for producing the carbon.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: October 5, 1993
    Assignee: Westvaco Corporation
    Inventor: Zhiquan Q. Yan