Patents by Inventor W. Douglas Bates, III

W. Douglas Bates, III 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).

  • Filtration media for liquid filtration
    Patent number: 8689985
    Abstract: Filtration media including at least one layer of nanofibers having average diameters less than 1000 nanometers with optional scrim layer(s) are disclosed for filtering particulate matter in liquid. The media achieve flow rates of at least 0.055 L/min/cm2 at relatively high levels of solidity. The media have also advantageously been found to have non-diminishing flow rates as differential pressures increase between 2 psi (14 kPa) and 15 psi (100 kPa).
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: April 8, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: W. Douglas Bates, III, Henricus Jacobus Cornelis Gommeren, Hageun Suh
  • FILTRATION MEDIA FOR LIQUID FILTRATION
    Publication number: 20100038307
    Abstract: Filtration media including at least one layer of nanofibers having average diameters less than 1000 nanometers with optional scrim layer(s) are disclosed for filtering particulate matter in liquid. The media achieve flow rates of at least 0.055 L/min/cm2 at relatively high levels of solidity. The media have also advantageously been found to have non-diminishing flow rates as differential pressures increase between 2 psi (14 kPa) and 15 psi (100 kPa).
    Type: Application
    Filed: July 16, 2009
    Publication date: February 18, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: W. Douglas Bates, III, Henricus Jacobus Cornelis Gommeren, Hageun Suh, Rachel Elizabeth Montejo
  • NONWOVEN WEB COMPRISING POLYARENAZOLE MICROFIBERS AND PROCESS FOR MAKING SAME
    Publication number: 20100003485
    Abstract: Provided is a fiber web comprising polymer fiber having an average fiber diameter of about 20 to 5000 nm, where the polymer fiber comprises a polyarenazole polymer having an inherent viscosity of greater than about 20 g/dl and the fiber web has a basis weight of from about 0.1 to 200 grams per square meter. Also provided are articles comprising such webs and methods of preparing such webs.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 7, 2010
    Inventors: Joseph Brian Hovanec, W. Douglas Bates, III
  • POLYARENAZOLE MICROFILAMENTS AND PROCESS FOR MAKING SAME
    Publication number: 20090311935
    Abstract: Provided is a polymer filament having an average diameter of about 20 to 5000 nm, the filament comprising a polyarenazole polymer having an inherent viscosity of greater than about 20 g/dl. Also provided are yarns comprising such filaments. Additional aspects concern fabrics and garments comprising such filaments and/or yarns.
    Type: Application
    Filed: July 26, 2007
    Publication date: December 17, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: W. Douglas Bates, III, Joseph Brian Hovanec, Vlodek Gabara