Patents by Inventor W. DOUGLAS BATES

W. DOUGLAS BATES 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).

  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20140234623
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: September 22, 2011
    Publication date: August 21, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: W. Douglas Bates
  • Poly(trimethylene arylate) fibers, process for preparing, and fabric prepared therefrom
    Patent number: 8753741
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: June 17, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventor: W. Douglas Bates
  • 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
  • Film of poly(trimethylene arylate)/polystyrene blends and process for making
    Patent number: 8563655
    Abstract: A film of poly(trimethylene arylate) and a polystyrene wherein the polystyrene concentration is in the range of 0.5 to 40 weight %. Poly(trimethylene terephthalate) and polystyrene are particularly useful. Also, disclosed are processes for preparing the film.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: October 22, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: W. Douglas Bates, Brett Collin Dobrick
  • Process of making poly(trimethylene arylate) fibers
    Patent number: 8540912
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: September 24, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventor: W. Douglas Bates
  • POLY(TRIMETHYLENE ARYLATE)/POLYSTYRENE COMPOSITION AND PROCESS FOR PREPARING
    Publication number: 20120296043
    Abstract: A composition of poly(trimethylene arylate), especially poly(trimethylene terephthalate), and polystyrene that is useful in the production of shaped articles such as fibers, films, and molded structures. The invention is useful as a masterbatch, also known as a concentrate, composition for combining with a PTT diluent in the economical production of fiber spinning compositions.
    Type: Application
    Filed: August 20, 2010
    Publication date: November 22, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: W. Douglas Bates, Brett Collin Dobrick
  • PROCESS FOR PRODUCING SHAPED ARTICLES OF POLY(TRIMETHYLENE ARYLATE)/POLYSTYRENE
    Publication number: 20120292808
    Abstract: A concentrate of poly(trimethylene arylate), particularly poly(trimethylene terephthalate) and polystyrene containing 15 to 40 wt % polystyrene is employed in the production of shaped articles such as films, pellets, and fibers. In one embodiment the concentrate is melt mixed with a polymeric diluent comprising a poly(trimethylene arylate) to form a spin blend comprising 0.5 to 1.5 wt % polystyrene, and the spin blend is extruded through a spinneret comprising a plurality of identical orficies, producing a plurality of filaments.
    Type: Application
    Filed: August 20, 2010
    Publication date: November 22, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: W. Douglas Bates, Brett Collin Dobrick
  • FILM OF POLY(TRIMETHYLENE ARYLATE)/POLYSTYRENE BLENDS AND PROCESS FOR MAKING
    Publication number: 20120283389
    Abstract: A film of poly(trimethylene arylate) and a polystyrene wherein the polystyrene concentration is in the range of 0.5 to 40 weight %. Poly(trimethylene terephthalate) and polystyrene are particularly useful. Also, disclosed are processes for preparing the film.
    Type: Application
    Filed: August 20, 2010
    Publication date: November 8, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: W. Douglas Bates, Brett Collin Dobrick
  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20120267822
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: October 13, 2011
    Publication date: October 25, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: W. Douglas Bates
  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20120028528
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: October 7, 2011
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: W. Douglas Bates
  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20120009418
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: September 22, 2011
    Publication date: January 12, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: W. DOUGLAS BATES
  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20110263171
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.5 to 5% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 27, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: W. DOUGLAS BATES
  • POLY(TRIMETHYLENE ARYLATE) FIBERS, PROCESS FOR PREPARING, AND FABRIC PREPARED THEREFROM
    Publication number: 20110260356
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene. Fabrics prepared therefrom are also disclosed.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 27, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: W. DOUGLAS BATES
  • 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