Patents by Inventor Anitha M. Mathew

Anitha M. Mathew 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).

  • Patent number: 12017177
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Grant
    Filed: April 11, 2022
    Date of Patent: June 25, 2024
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Patent number: 11612845
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: March 28, 2023
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20220314156
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Application
    Filed: April 11, 2022
    Publication date: October 6, 2022
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Patent number: 11298645
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: April 12, 2022
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20210077939
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 18, 2021
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Patent number: 10786774
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: September 29, 2020
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20200139290
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Application
    Filed: January 6, 2020
    Publication date: May 7, 2020
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Patent number: 10525397
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 7, 2020
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Patent number: 10363513
    Abstract: A method form forming fluted filtration media is provided. The method includes forming fluted filtration media having a repeating pattern of flutes wherein at least one flute in the repeating pattern of flutes comprises at least one ridge in a flute period between adjacent same side peaks, the flutes showing a tapered cross sectional area.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 30, 2019
    Assignee: Donaldson Company, Inc.
    Inventors: Ted A. Moe, Gregory J. Fesenmaier, Gary J. Rocklitz, Ming Ouyang, Anitha M. Mathew
  • Patent number: 9808752
    Abstract: A method form forming fluted filtration media is provided. The method includes forming fluted filtration media having a repeating pattern of flutes wherein at least one flute in the repeating pattern of flutes comprises at least one ridge in a flute period between adjacent same side peaks. The repeating pattern of flutes can comprise at least one flute having at least two ridges provided in a flute period between adjacent same side peaks. An apparatus for forming fluted filtration media is provided.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: November 7, 2017
    Assignee: Donaldson Company, Inc.
    Inventors: Ted A. Moe, Gregory J. Fesenmaier, Gary J. Rocklitz, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20170216758
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Application
    Filed: December 8, 2016
    Publication date: August 3, 2017
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20170028341
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other face of the media pack passes through media to provide filtration of the fluid.
    Type: Application
    Filed: July 28, 2016
    Publication date: February 2, 2017
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel E. Adamek, Ming Ouyang, Anitha M. Mathew
  • Patent number: 8734557
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: May 27, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Patent number: 8545589
    Abstract: A filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered fluid flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered fluid flowing out of the second portion of the plurality of flutes so that fluid passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the fluid. The filtration media pack can be provided with increased filtration media compared with commonly used z-media packs.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: October 1, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Daniel Adamek, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20130228077
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Application
    Filed: January 17, 2013
    Publication date: September 5, 2013
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Patent number: 8361183
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: January 29, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20120196733
    Abstract: A method form forming fluted filtration media is provided. The method includes forming fluted filtration media having a repeating pattern of flutes wherein at least one flute in the repeating pattern of flutes comprises at least one ridge in a flute period between adjacent same side peaks, the flutes showing a tapered cross sectional area.
    Type: Application
    Filed: August 3, 2010
    Publication date: August 2, 2012
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Ted A. Moe, Gregory J. Fesenmaier, Gary J. Rocklitz, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20110277431
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Application
    Filed: May 18, 2011
    Publication date: November 17, 2011
    Applicant: DONALDSON COMPANY , INC.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Patent number: 7959702
    Abstract: An air filtration media pack is provided having a plurality of layers of single facer media. The layer of single facer media includes a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet and having a flute length extending from a first face of the filtration media pack to a second face of the filtration media pack. A first portion of the plurality of flutes are closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes are closed to unfiltered air from flowing out of the second portion of the plurality of flutes so that air passing into one of the first face and the second face of the media pack and out the other of the first face and the second face of the media pack passes through media to provide filtration of the air. The fluted sheet includes repeating internal peaks facing toward the facing sheet and repeating external peaks facing away from the facing sheet.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: June 14, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Gary J. Rocklitz, Robert M. Rogers, Ming Ouyang, Anitha M. Mathew
  • Publication number: 20090211696
    Abstract: A method form forming fluted filtration media is provided. The method includes forming fluted filtration media having a repeating pattern of flutes wherein at least one flute in the repeating pattern of flutes comprises at least one ridge in a flute period between adjacent same side peaks. The repeating pattern of flutes can comprise at least one flute having at least two ridges provided in a flute period between adjacent same side peaks. An apparatus for forming fluted filtration media is provided.
    Type: Application
    Filed: February 3, 2009
    Publication date: August 27, 2009
    Inventors: Ted A. Moe, Gregory J. Fesenmaier, Gary J. Rocklitz, Ming Ouyang, Anitha M. Mathew