Patents by Inventor Douglas G. Crofoot

Douglas G. Crofoot 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).

  • Fine fiber media layer
    Patent number: 10967315
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: April 6, 2021
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Young Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • FINE FIBER MEDIA LAYER
    Publication number: 20200122068
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: April 29, 2019
    Publication date: April 23, 2020
    Inventors: Hoo Young Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 10272374
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: April 30, 2019
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Young Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • FINE FIBER MEDIA LAYER
    Publication number: 20170319993
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: June 23, 2017
    Publication date: November 9, 2017
    Inventors: Hoo Young Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 9718012
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: August 1, 2017
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Young Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • FINE FIBER MEDIA LAYER
    Publication number: 20140196420
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: January 24, 2014
    Publication date: July 17, 2014
    Applicant: Donaldson Company, Inc.
    Inventors: Hoo Young Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 8709118
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 29, 2014
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 8512431
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: August 20, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 8366797
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: February 5, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • FINE FIBER MEDIA LAYER
    Publication number: 20130001154
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hoo Y. Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • FINE FIBER MEDIA LAYER
    Publication number: 20120204527
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: August 17, 2011
    Publication date: August 16, 2012
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hoo Y. Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Reduced solidity web comprising fiber and fiber spacer or separation means
    Patent number: 8177876
    Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: May 15, 2012
    Assignee: Donaldson Company, Inc.
    Inventors: Veli E. Kalayci, Douglas G. Crofoot, Timothy H. Grafe, Kristine M. Graham
  • Fine fiber media layer
    Patent number: 8118901
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: February 21, 2012
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • Fine fiber media layer
    Patent number: 8029588
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: October 4, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Hoo Y. Chung, John R. B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • REDUCED SOLIDITY WEB COMPRISING FIBER AND FIBER SPACER OR SEPARATION MEANS
    Publication number: 20110139706
    Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
    Type: Application
    Filed: February 21, 2011
    Publication date: June 16, 2011
    Applicant: Donaldson Company, Inc.
    Inventors: Veli E. Kalayci, Douglas G. Crofoot, Timothy H. Grafe, Kristine M. Graham
  • Reduced solidity web comprising fiber and fiber spacer or separation means
    Patent number: 7918913
    Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: April 5, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Veli E. Kalayci, Douglas G. Crofoot, Timothy H. Grafe, Kristine M. Graham
  • FINE FIBER MEDIA LAYER
    Publication number: 20110067369
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: December 1, 2010
    Publication date: March 24, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hoo Y. Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik
  • REDUCED SOLIDITY WEB COMPRISING FIBER AND FIBER SPACER OR SEPARATION MEANS
    Publication number: 20110005180
    Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
    Type: Application
    Filed: August 17, 2009
    Publication date: January 13, 2011
    Applicant: Donaldson Company, Inc.
    Inventors: Veli E. Kalayci, Douglas G. Crofoot, Timothy H. Grafe, Kristine M. Graham
  • Reduced solidity web comprising fiber and fiber spacer or separation means
    Patent number: 7717975
    Abstract: A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: May 18, 2010
    Assignee: Donaldson Company, Inc.
    Inventors: Veli E. Kalayci, Douglas G. Crofoot, Timothy H. Grafe, Kristine M. Graham
  • FINE FIBER MEDIA LAYER
    Publication number: 20100064645
    Abstract: Disclosed are improved polymer materials. Also disclosed are fine fiber materials that can be made from the improved polymeric materials in the form of microfiber and nanofiber structures. The microfiber and nanofiber structures can be used in a variety of useful applications including the formation of filter materials.
    Type: Application
    Filed: October 30, 2009
    Publication date: March 18, 2010
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hoo Y. Chung, John R.B. Hall, Mark A. Gogins, Douglas G. Crofoot, Thomas M. Weik