Patents by Inventor Keith W. Rollag

Keith W. Rollag 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).

  • Patent number: 5591155
    Abstract: The present invention provides a disposable training pant having an improved elasticized side panel which gives improved fit and comfort. The disposable diaper has an absorbent core chassis (30) and a pair of elasticized side panels (50) connected to the longitudinal sides of the chassis, where each side panel is formed of two elasticized laminate members (10), joined by a side seam along a non-elasticized outboard edge (52) of each member.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: January 7, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Masaharu Nishikawa, Keith W. Rollag, David M. Sageser, Jiro Yamada
  • Patent number: 5575783
    Abstract: Absorbent articles such as disposable diapers, incontinent briefs, diaper holders, training pants, and the like, that provide dynamic fit about the wearer by the use of elasticized hip panels. Such absorbent articles comprise a liquid pervious topsheet; a liquid impervious backsheet; an absorbent core disposed between the topsheet and the backsheet; elasticized side panels positioned in the side panels of the back waist region; and an elasticized hip panel positioned in the central region of the back waist region. The elasticized hip panel comprises a stretch laminate comprising one or more elongatable components and an elastic hip panel member that are mechanically stretched to allow expansion of the stretch laminate beyond the original planar state of the diaper in the lateral direction.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: November 19, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Sandra H. Clear, Keith W. Rollag, Hiroshi Nakahata