Patents by Inventor Gregory S. Tronnes

Gregory S. Tronnes 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 media, elements, and methods
    Patent number: 11845027
    Abstract: Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: December 19, 2023
    Assignee: Donaldson Company, Inc.
    Inventors: Qiong Gao, Richard Patrick DeJong, Gregory S. Tronnes, Jason A. Tiffany, Giancarlo M. Izzi
  • FILTER ELEMENT WITH IMPROVED DUST LOADING
    Publication number: 20230364546
    Abstract: Embodiments disclosed herein relate to a pleated filter element having filter media having a downstream layer of filter material and an upstream layer of fibers. A spacing structure defines a void space between the upstream layer of fibers and the downstream layer of filter material.
    Type: Application
    Filed: September 27, 2021
    Publication date: November 16, 2023
    Inventors: Gregory S. Tronnes, Robert M. Rogers, Aflal Rahmathullah
  • FILTER MEDIA AND ELEMENTS
    Publication number: 20220212132
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Application
    Filed: January 14, 2022
    Publication date: July 7, 2022
    Inventors: Qiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
  • FILTER MEDIA WITH IMPROVED DUST LOADING
    Publication number: 20220152537
    Abstract: Embodiments disclosed herein relate to filter media having a downstream layer of filter material and an upstream layer of fibers. The downstream layer of filter material has a capture efficiency of at least 10% and the upstream layer of fibers has a mean fiber diameter of at least 10 microns and a solidity of less than 10%. A spacing structure defines a mean void distance between the upstream layer of fibers and the downstream layer of filter material.
    Type: Application
    Filed: March 27, 2020
    Publication date: May 19, 2022
    Inventors: Gregory S. Tronnes, Robert M. Rogers, Aflal Rahmathullah
  • FILTER MEDIA, ELEMENTS, AND METHODS
    Publication number: 20220118387
    Abstract: Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 21, 2022
    Inventors: Qiong Gao, Richard Patrick DeJong, Gregory S. Tronnes, Jason A. Tiffany, Giancarlo M. Izzi
  • Filter media and elements
    Patent number: 11253802
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: February 22, 2022
    Assignee: Donaldson Company, Inc.
    Inventors: Qiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
  • Filter media, elements, and methods
    Patent number: 11161070
    Abstract: Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: November 2, 2021
    Assignee: Donaldson Company, Inc.
    Inventors: Qiong Gao, Richard Patrick DeJong, Gregory S. Tronnes, Jason A. Tiffany, Giancarlo M. Izzi
  • FILTER MEDIA AND ELEMENTS
    Publication number: 20190336897
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Application
    Filed: July 19, 2019
    Publication date: November 7, 2019
    Applicant: Donaldson Company, Inc.
    Inventors: Qiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
  • FILTER MEDIA, ELEMENTS, AND METHODS
    Publication number: 20190255473
    Abstract: Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.
    Type: Application
    Filed: May 5, 2017
    Publication date: August 22, 2019
    Inventors: Qiong Gao, Richard Patrick DeJong, Gregory S. Tronnes, Jason A. Tiffany, Giancarlo M. Izzi
  • Filter media and elements
    Patent number: 10357730
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: July 23, 2019
    Assignee: Donaldson Company, Inc.
    Inventors: Qiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
  • Filter media and elements
    Patent number: 9474994
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: October 25, 2016
    Assignee: DONALDSON COMPANY, INC.
    Inventors: Qiong Gao, Gregory S. Tronnes, Rakesh Kumar Yadav, Michael A. Madden
  • FILTER MEDIA AND ELEMENTS
    Publication number: 20160129381
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Application
    Filed: March 5, 2014
    Publication date: May 12, 2016
    Inventors: Qiong Gao, Gregory S. Tronnes, Raskesh Kumar Yadav, Michael A. Madden, William Charles Goodson, Richard Patrick DeJong
  • FILTER MEDIA AND ELEMENTS
    Publication number: 20140366732
    Abstract: Fibrous filter medium that includes a melt-blown filter layer comprising melt-blown fibers and a high-efficiency glass-containing filter layer comprising glass fibers.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventors: Qiong Gao, Gregory S. Tronnes