Patents by Inventor John S. Kieffer

John S. Kieffer 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: 4789699
    Abstract: An extrudable composition for forming nonwoven elastomeric material having pressure sensitive adhesive properties, nonwoven elastomeric sheet material (e.g., fibrous nonwoven webs) formed of such composition, stretch bonded laminates using such sheets, and methods of forming such sheets and such laminates, are disclosed. The composition includes an elastomeric polymer and a tackifying resin, and can also include a polyolefin. The nonwoven sheet material can be a meltblown nonwoven web. The laminate can be formed by tensioning the elastomeric sheet material and bonding a gatherable web (e.g., a spunbond polypropylene web) to the tensioned sheet material by application of pressure, the bonding being accomplished due to the adhesivity of the elastomeric sheet material and without application of heat for softening the sheet material and/or gatherable web.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: December 6, 1988
    Assignee: Kimberly-Clark Corporation
    Inventors: John S. Kieffer, Tony J. Wisneski