Patents by Inventor Henry J. Drasner, III

Henry J. Drasner, III 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).

  • 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
  • Respirator cartridge with sealant dispersion member
    Patent number: 5063926
    Abstract: A respirator cartridge having body, cover and filter media elements, and including a sealant dispersion member in one of the body or cover elements. The dispersion member directs the sealant material to the peripheral edge of the filter media without wetting the filtering surface of the media. An improved method for rotational molding filter media in/or for a filter assembly is also provided.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: November 12, 1991
    Assignee: Donaldson Company, Inc.
    Inventors: R. David Forsgren, Henry J. Drasner, III, Roy E. Fielder