Patents by Inventor Suzan K. Nunnink

Suzan K. Nunnink 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).

  • Method of making a filter device
    Patent number: 6168681
    Abstract: A filter device filters contaminants from air for magnetic disk drive systems. The filter has layers of permeable fabric material allowing flow through the filter. An adsorptive slurry is deposited in a discreet pattern onto one layer with a cover layer mounted over the adsorptive deposit. The slurry retains a high adsorptive material surface area for improved adsorption of contaminants. The slurry is placed onto the base material using a screening or other similar application method.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: January 2, 2001
    Assignee: Donaldson & Company, Inc.
    Inventors: Cynthia D. Bellefeuille, Andrew J. Dallas, M. E. Wright, Michael A. Madden, Suzan K. Nunnink
  • Filter and method for making a filter
    Patent number: 6077335
    Abstract: A filter is provided which includes an organic vapor adsorbing layer, a first particulate removal layer, and a second particulate removal layer. The organic vapor adsorbing layer includes porous adsorbent beads which allow air or gas to flow therethrough with little resistance and provide increased surface area by virtue of the pores. The particulate removal layer can be made from an electrostatic and/or polytetraflouroethylene. The filter can have a figure of merit greater than about 10 and a capacity for permanently adsorbing organic vapors, wherein the figure of merit is calculated based upon a fractional efficiency determined for particles having a size of 0.3 .mu.m in an air flow having a velocity of 10.5 ft./min and for Frazier permeability at 0.5 inches H.sub.2 O.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: June 20, 2000
    Assignee: Donaldson Company, Inc.
    Inventors: Kirk A. Schneider, Henry J. Drasner, III, Allan L. Liebrenz, Katsushi Isogawa, Stanley Bucknam Miller, III, Paul Lawrence Kojetin, Cynthia D. Bellefeuille, Andrew J. Dallas, Suzan K. Nunnink
  • Filter and method for making a filter
    Patent number: 5997618
    Abstract: A filter is provided which includes an organic vapor adsorbing layer, a first particulate removal layer, and a second particulate removal layer. The organic vapor adsorbing layer includes porous adsorbent beads which allow air or gas to flow therethrough with little resistance and provide increased surface area by virtue of the pores. The particulate removal layer can be made from an electrostatic and/or polytetraflouroethylene. The filter can have a figure of merit greater than about 10 and a capacity for permanently adsorbing organic vapors, wherein the figure of merit is calculated based upon a fractional efficiency determined for particles having a size of 0.3 .mu.m in an air flow having a velocity of 10.5 ft./min and for Frazier permeability at 0.5 inches H.sub.2 O.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: December 7, 1999
    Assignee: Donaldson Company, Inc.
    Inventors: Kirk A. Schneider, Henry J. Drasner, III, Allan L. Liebrenz, Katsushi Isogawa, Stanley Bucknam Miller, III, Paul Lawrence Kojetin, Cynthia D. Bellefeuille, Andrew J. Dallas, Suzan K. Nunnink
  • Filter device
    Patent number: 5869009
    Abstract: A filter device filters contaminants from air for magnetic disk drive systems. The filter has layers of permeable fabric material allowing flow through the filter. An adsorptive slurry is deposited in a discrete pattern onto one layer with a cover layer mounted over the adsorptive deposit. The slurry retains a high adsorptive material surface area for improved adsorption of contaminants. The slurry is placed onto the base material using a screening or other similar application method.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: February 9, 1999
    Assignee: Donaldson Company, Inc.
    Inventors: Cynthia D. Bellefeuille, Andrew J. Dallas, M. E. Wright, Michael A. Madden, Suzan K. Nunnink