Patents by Inventor Lefei Ding

Lefei Ding 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).

  • Adsorptive duct for contaminant removal, and methods
    Patent number: 6997977
    Abstract: A duct for passage of air therethough; one particular use for the duct is as a passage for intake air for a vehicle engine. The duct has an interior, adsorptive region that is adapted to remove contaminants from the air stream passing therethrough. The adsorptive region includes adsorptive material such as carbon (usually activated carbon), activated alumina, zeolites, metal oxides or ion exchange resin. The duct inhibits diffusion of uncombusted gasoline back through the duct from the engine, after the engine has been shut off.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: February 14, 2006
    Assignee: Donaldson Company, Inc.
    Inventors: Andrew James Dallas, Steven Alan Carter, Jordan Spencer Flagstad, Lefei Ding, Jon Dennis Joriman
  • Chemical filtration unit incorporating air transportation device
    Publication number: 20050229562
    Abstract: The present invention overcomes the limits of activated carbons, ion exchange resin beads and fibers, and liquid form ion exchangers for acid, base, or VOCs gases removal by providing a filtration assembly for the filtration of chemical contaminants and particulates from an air or gas stream, the assembly having a low pressure-drop structure. The filtration assembly includes a low-pressure drop chemical filter, a low-pressure drop particulate filter, and an air transportation device, such as a fan or blower, all combined in a housing.
    Type: Application
    Filed: April 12, 2005
    Publication date: October 20, 2005
    Inventors: Andrew Dallas, Lefei Ding, Jon Joriman, Jonathan Parsons
  • Adsorptive filter element and methods
    Publication number: 20050092176
    Abstract: An adsorbent article having a base body or matrix onto which is applied an adsorptive coating. The body or matrix can be a honeycomb matrix or structure having a plurality of cells defining a plurality of passages extending through the body. The adsorptive coating comprises an adsorptive media, such as activated carbon or ion exchange resin, that is bound by a polymeric adhesive or resin. A reactant material is preferably included in the adsorptive coating. The adsorbent article has a minimal pressure loss therethrough.
    Type: Application
    Filed: September 23, 2004
    Publication date: May 5, 2005
    Inventors: Lefei Ding, Daniel Adamek, Andrew Dallas, Brian Hoang, Jon Joriman, Kevin Seguin
  • Adsorptive duct for contaminant removal, and methods
    Publication number: 20050005770
    Abstract: A duct for passage of air therethough; one particular use for the duct is as a passage for intake air for a vehicle engine. The duct has an interior, adsorptive region that is adapted to remove contaminants from the air stream passing therethrough. The adsorptive region includes adsorptive material such as carbon (usually activated carbon), activated alumina, zeolites, metal oxides or ion exchange resin. The duct inhibits diffusion of uncombusted gasoline back through the duct from the engine, after the engine has been shut off.
    Type: Application
    Filed: May 4, 2004
    Publication date: January 13, 2005
    Inventors: Andrew Dallas, Steven Carter, Jordan Flagstad, Lefei Ding, Jon Joriman
  • Adsorption element and methods
    Publication number: 20050005769
    Abstract: An adsorbent article having a base body or matrix onto which is applied an adsorptive coating. The body or matrix can be a honeycomb matrix or structure having a plurality of cells defining a plurality of passages extending through the body. The adsorptive coating comprises an adsorptive media, such as activated carbon or ion exchange resin, that is bound by a polymeric adhesive or resin. The adsorbent article has a minimal pressure loss therethrough.
    Type: Application
    Filed: November 10, 2003
    Publication date: January 13, 2005
    Applicant: Donaldson Company, Inc
    Inventors: Kevin Seguin, Steven Carter, Andrew Dallas, Lefei Ding, Brian Hoang, Jon Joriman
  • Adsorptive duct for contaminant removal, and methods
    Publication number: 20040069146
    Abstract: A duct for passage of air therethough; one particular use for the duct is as a passage for intake air for a vehicle engine. The duct has an interior, adsorptive region that is adapted to remove contaminants from the air stream passing therethrough. The adsorptive region includes adsorptive material such as carbon (usually activated carbon), activated alumina, zeolites, metal oxides or ion exchange resin. The duct inhibits diffusion of uncombusted gasoline back through the duct from the engine, after the engine has been shut off.
    Type: Application
    Filed: July 31, 2003
    Publication date: April 15, 2004
    Inventors: Steven Alan Carter, Jordan Spencer Flagstad, Lefei Ding, Jon Dennis Joriman, Andrew James Dallas
  • Adsorption element and methods
    Patent number: 6645271
    Abstract: An adsorbent article having a base body or matrix onto which is applied an adsorptive coating. The body or matrix can be a honeycomb matrix or structure having a plurality of cells defining a plurality of passages extending through the body. The adsorptive coating comprises an adsorptive media, such as activated carbon or ion exchange resin, that is bound by a polymeric adhesive or resin. The adsorbent article has a minimal pressure loss therethrough.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: November 11, 2003
    Assignee: Donaldson Company, Inc.
    Inventors: Kevin John Seguin, Steven Alan Carter, Andrew James Dallas, Lefei Ding, Brian Nghia Hoang, Jon Dennis Joriman
  • Adsorption element and methods
    Publication number: 20030041733
    Abstract: An adsorbent article having a base body or matrix onto which is applied an adsorptive coating. The body or matrix can be a honeycomb matrix or structure having a plurality of cells defining a plurality of passages extending through the body. The adsorptive coating comprises an adsorptive media, such as activated carbon or ion exchange resin, that is bound by a polymeric adhesive or resin. The adsorbent article has a minimal pressure loss therethrough.
    Type: Application
    Filed: June 7, 2002
    Publication date: March 6, 2003
    Inventors: Kevin John Seguin, Steven Alan Carter, Andrew James Dallas, Lefei Ding, Brian Nghia Hoang, Jon Dennis Joriman