Patents by Inventor David S. Varney

David S. Varney 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: 8202609
    Abstract: An absorbent material for use in a disposable absorbent product exhibiting enhanced wet strength characteristics includes a blend of cellulosic fibrous material and superabsorbent polymeric material, with a wax applied to the blend in a preferably discontinuous or non-uniform distribution for enhancing wet strength characteristics of the material, without unacceptably diminishing its absorbency. Notably, the absorbent material includes regions of relatively high densification, which can exist about particles of superabsorbent material, with application of wax in a molten form resulting in the spontaneous flow and migration of the wax to the regions of higher densification. The material can be formed with a pattern of regions of relatively high and low densification, with the wax preferentially distributed in those regions of high densification.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: June 19, 2012
    Assignee: EAM Corporation
    Inventors: Paul M. Ducker, Steven S. Harlen, David S. Varney
  • Publication number: 20100209668
    Abstract: An absorbent material for use in a disposable absorbent product exhibiting enhanced wet strength characteristics includes a blend of cellulosic fibrous material and superabsorbent polymeric material, with a wax applied to the blend in a preferably discontinuous or non-uniform distribution for enhancing wet strength characteristics of the material, without unacceptably diminishing its absorbency. Notably, the absorbent material includes regions of relatively high densification, which can exist about particles of superabsorbent material, with application of wax in a molten form resulting in the spontaneous flow and migration of the wax to the regions of higher densification. The material can be formed with a pattern of regions of relatively high and low densification, with the wax preferentially distributed in those regions of high densification.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 19, 2010
    Inventors: Paul M. Ducker, Steven S. Harlen, David S. Varney
  • Publication number: 20030234468
    Abstract: An absorbent material is provided with improved characteristics. A process is provided for making the absorbent material. A web is formed with at least one layer of absorbent material, and it may include a mixture of cellulosic fibers and superabsorbent material. The moisture content of the web is increased so as to increase the web density. Then, the web is compacted at an elevated temperature to further increase the web density and preferably to also effect hydrogen bonding within the web. In one embodiment a tissue layer is provided, is wetted with water, and is bonded to the layer of absorbent material.
    Type: Application
    Filed: March 25, 2003
    Publication date: December 25, 2003
    Inventors: Krishnakumar Rangachari, Erol Tan, Steven Scott Harlen, Kimberly W. Sumner, David S. Varney