Patents by Inventor Kenneth Stewart, Jr.

Kenneth Stewart, Jr. 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).

  • Elastic bicomponent and biconstituent fibers, and methods of making cellulosic structures from the same
    Patent number: 6811871
    Abstract: The elasticity of elastic, absorbent structures, e.g., diapers, is improved without a significant compromise of the absorbency of the structure by the use of bicomponent and/or biconstituent elastic fiber. The absorbent structures typically comprise a staple fiber, e.g., cellulose fibers, and a bicomponent and/or a biconstituent elastic. The bicomponent fiber typically has a core/sheath construction. The core comprises an elastic thermoplastic elastomer, preferably a TPU, and the sheath comprises a homogeneously branched polyolefin, preferably a homogeneously branched substantially linear ethylene polymer. In various embodiments of the invention, the elasticity is improved by preparation techniques that enhance the ratio of elastic fiber:cellulose fiber versus cellulose fiber:cellulose fiber bonding.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: November 2, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Ashish Sen, John Klier, Rexford A. Maugans, Kenneth Stewart, Jr.
  • Elastic bicomponent and biconstituent fibers, and methods of making cellulosic structures from the same
    Patent number: 6773810
    Abstract: The elasticity of elastic, absorbent structures, e.g., diapers, is improved without a significant compromise of the absorbency of the structure by the use of bicomponent and/or biconstituent elastic fibers. The absorbent structures typically comprise a staple fiber, e.g., cellulose fibers, and a bicomponent and/or a biconstituent elastic. The bicomponent fiber typically has a core/sheath construction. The core comprises an elastic thermoplastic elastomer, preferably a TPU, and the sheath comprises a homogeneously branched polyolefin, preferably a homogeneously branched substantially linear ethylene polymer. In various embodiments of the invention, the elasticity is improved by preparation techniques that enhance the ratio of elastic fiber:cellulose fiber bonding versus cellulose fiber:cellulose fiber bonding.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: August 10, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Ashish Sen, John Klier, Rexford A. Maugans, Kenneth Stewart, Jr.