Allan L Liebrenz, 783450 Kings Point Rd, Excelsior, MN 55331
Allan Liebrenz Phones & Addresses
Excelsior, MN
Mentions for Allan L Liebrenz
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Us Patents
Filter And Method For Making A Filter
US Patent:
6077335, Jun 20, 2000
Filed:
Jul 12, 1999
Appl. No.:
9/352183
Inventors:
Kirk A. Schneider - Eden Prairie MN
Henry J. Drasner - Edina MN
Allan L. Liebrenz - Excelsior MN
Katsushi Isogawa - Rosemount MN
Stanley Bucknam Miller - Eden Prairie MN
Paul Lawrence Kojetin - Rosemount MN
Cynthia D. Bellefeuille - Eden Prairie MN
Andrew J. Dallas - Apple Valley MN
Suzan K. Nunnink - Delano MN
Henry J. Drasner - Edina MN
Allan L. Liebrenz - Excelsior MN
Katsushi Isogawa - Rosemount MN
Stanley Bucknam Miller - Eden Prairie MN
Paul Lawrence Kojetin - Rosemount MN
Cynthia D. Bellefeuille - Eden Prairie MN
Andrew J. Dallas - Apple Valley MN
Suzan K. Nunnink - Delano MN
Assignee:
Donaldson Company, Inc. - Minneapolis MN
International Classification:
B01D 5304
B01D 4610
B01D 4610
US Classification:
96135
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.
Filter And Method For Making A Filter
US Patent:
5997618, Dec 7, 1999
Filed:
Sep 25, 1997
Appl. No.:
8/936382
Inventors:
Kirk A. Schneider - Eden Prairie MN
Henry J. Drasner - Edina MN
Allan L. Liebrenz - Excelsior MN
Katsushi Isogawa - Rosemount MN
Stanley Bucknam Miller - Eden Prairie MN
Paul Lawrence Kojetin - Rosemount MN
Cynthia D. Bellefeuille - Eden Prairie MN
Andrew J. Dallas - Apple Valley MN
Suzan K. Nunnink - Delano MN
Henry J. Drasner - Edina MN
Allan L. Liebrenz - Excelsior MN
Katsushi Isogawa - Rosemount MN
Stanley Bucknam Miller - Eden Prairie MN
Paul Lawrence Kojetin - Rosemount MN
Cynthia D. Bellefeuille - Eden Prairie MN
Andrew J. Dallas - Apple Valley MN
Suzan K. Nunnink - Delano MN
Assignee:
Donaldson Company, Inc. - Minneapolis MN
International Classification:
B01D 5304
B01D 4610
B01D 4610
US Classification:
96135
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.
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