Patents by Inventor Lawrence Mark Knorr

Lawrence Mark Knorr 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).

  • Liquid filtration media
    Patent number: 9180393
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.1 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.0002 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: November 10, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr
  • Liquid filtration media
    Patent number: 8038013
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.95 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.01 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 18, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr
  • Liquid filtration media
    Patent number: 7993523
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.1 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.0002 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: August 9, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr
  • LIQUID FILTRATION MEDIA
    Publication number: 20110042316
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.1 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.0002 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Application
    Filed: November 5, 2010
    Publication date: February 24, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr
  • Liquid filtration media
    Publication number: 20090026137
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.1 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.0002 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Application
    Filed: September 18, 2008
    Publication date: January 29, 2009
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr
  • Liquid filtration media
    Publication number: 20080217239
    Abstract: A liquid filter with a composite medium that has a nanoweb adjacent to and optionally bonded to a microporous membrane. The membrane is characterized by an LRV value of 3.7 at a rated particle size, and the nanoweb has a fractional filtration efficiency of greater than 0.95 at the rated particle size of the membrane. The nanoweb also has a thickness efficiency ratio of greater than 0.01 at that efficiency. The nanoweb acts to provide depth filtration to the membrane, prefilters particles and extends the lifetime of the membrane.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 11, 2008
    Inventors: Guanghui Chen, Henricus Jacobus Cornelis Gommeren, Lawrence Mark Knorr