Patents by Inventor John W. M. Roberts

John W. M. Roberts 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).

  • Fibers and nonwoven materials prepared therefrom
    Patent number: 11549201
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and an impact copolymer. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the copolymer component comprises less than about 55 wt % ethylene-derived units, based on the weight of the copolymer component.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 10, 2023
    Assignee: EXXONMOBIL CHEMICALS PATENTS INC.
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • Fibers and nonwoven materials prepared therefrom
    Patent number: 11214036
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • Polyalphaolefin Modified Polymer Blends for Nonwovens
    Publication number: 20200157328
    Abstract: A fiber or nonwoven and methods for making and using same are provided herein. The fiber or nonwoven can contain at least one primary polypropylene, at least one polyalphaolefin, and at least one propylene-based elastomer. The propylene-based elastomer can have a heat of fusion less than about 80 J/g. The propylene-based elastomer can also include greater than 50 wt % propylene and from about 3 to about 25 wt % units derived from one or more C2 or C4-C12 ?-olefins, based on a total weight of the propylene-based elastomer.
    Type: Application
    Filed: October 29, 2019
    Publication date: May 21, 2020
    Inventors: Paul E. Rollin, JR., John W. M. Roberts, Jessica L. Prince, Syamal Tallury, Narayanaswami Dharmarajan, Andrew V. Stephens, Louis K. Apraku-Boadi
  • Fibers and Nonwoven Materials Prepared Therefrom
    Publication number: 20160082690
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.
    Type: Application
    Filed: June 12, 2014
    Publication date: March 24, 2016
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • Fibers and Nonwoven Materials Prepared Therefrom
    Publication number: 20160076171
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and an impact copolymer. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the copolymer component comprises less than about 55 wt % ethylene-derived units, based on the weight of the copolymer component.
    Type: Application
    Filed: June 12, 2014
    Publication date: March 17, 2016
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts