Patents by Inventor Frederick M. Langdon

Frederick M. Langdon 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: 6231948
    Abstract: The present invention pertains, in a preferred embodiment, to a fluid-pervious web comprising a first or wearer-contacting surface and a second or garment-facing surface. The web is particularly well suited for use as a topsheet on a disposable absorbent article. The first and second surfaces are separated from one another by an intermediate portion. The first surface of the web provides a structure which exhibits a surface energy less than the surface energy of the intermediate portion. In a preferred embodiment, the web exhibits a plurality of regions of comparatively low surface energy which define surface energy gradients where they interface with higher surface energy web surfaces. More particularly, the present invention pertains to a fluid-pervious web having a plurality of small-scale surface energy gradients which are oriented and located so as to effectively transport fluid away from the first or wearer-contacting surface.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: May 15, 2001
    Assignee: The Procter & Gamble Company
    Inventors: William R. Ouellette, Yann-Per Lee, A. Renee Haney, Frederick M. Langdon, John B. Burchnall
  • Patent number: 6180052
    Abstract: The present invention pertains, in a preferred embodiment, to a fluid-pervious web comprising a first or wearer-contacting surface and a second or garment-facing surface. The web is particularly well suited for use as a topsheet on a disposable absorbent article. The first and second surfaces are separated from one another by an intermediate portion. The first surface of the web provides a structure which exhibits a surface energy less than the surface energy of the intermediate portion. In a preferred embodiment, the web exhibits a plurality of regions of comparatively low surface energy which define surface energy gradients where they interface with higher surface energy web surfaces. More particularly, the present invention pertains to a fluid-pervious web having a plurality of small-scale surface energy gradients which are oriented and located so as to effectively transport fluid away from the first or wearer-contacting surface.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: January 30, 2001
    Assignee: The Procter & Gamble Company
    Inventors: William R. Ouellette, Frederick M. Langdon, John B. Burchnall
  • Patent number: 6025049
    Abstract: The present invention pertains, in a preferred embodiment, to a fluid-pervious web comprising a first or wearer-contacting surface and a second or garment-facing surface. The web is particularly well suited for use as a topsheet on a disposable absorbent article. The first and second surfaces are separated from one another by an intermediate portion. The first surface of the web provides a structure which exhibits a surface energy less than the surface energy of the intermediate portion. In a preferred embodiment, the web exhibits a plurality of regions of comparatively low surface energy which define surface energy gradients where they interface with higher surface energy web surfaces. More particularly, the present invention pertains to a fluid-pervious web having a plurality of small-scale surface energy gradients which are oriented and located so as to effectively transport fluid away from the first or wearer-contacting surface.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: February 15, 2000
    Assignee: The Procter & Gamble Company
    Inventors: William R. Ouellette, Yann-Per Lee, A. Renee Haney, Frederick M. Langdon, John B. Burchnall
  • Patent number: 5989478
    Abstract: The present invention pertains, in a preferred embodiment, to a fluid-pervious web comprising a first or wearer-contacting surface and a second or garment-facing surface. The web is particularly well suited for use as a topsheet on a disposable absorbent article. The first and second surfaces are separated from one another by an intermediate portion. The first surface of the web provides a structure which exhibits a surface energy less than the surface energy of the intermediate portion. In a preferred embodiment, the web exhibits a plurality of regions of comparatively low surface energy which define surface energy gradients where they interface with higher surface energy web surfaces. More particularly, the present invention pertains to a fluid-pervious web having a plurality of small-scale surface energy gradients which are oriented and located so as to effectively transport fluid away from the first or wearer-contacting surface.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: November 23, 1999
    Assignee: The Procter & Gamble Company
    Inventors: William R. Ouellette, Yann-Per Lee, A. Renee Haney, Frederick M. Langdon, John B. Burchnall
  • Patent number: 5693169
    Abstract: The present invention relates to a method for making laminate materials, and more particularly the present invention relates to a method for making laminate materials having a capillary zone or passageway to acquire, move and/or store fluid within the laminate material. Such laminate materials are particularly suitable for use as a topsheet, an acquisition layer and/or an absorbent core in absorbent articles such as disposable diapers, catamenials, sanitary napkins, bandages, incontinent briefs and the like.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: December 2, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Frederick M. Langdon, John B. Burchnall, Gregory B. Hyde