Patents by Inventor C. Duncan

C. Duncan 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: 3952745
    Abstract: A disposable diaper is provided with an absorbent pad comprised of airfelt or a similar low-strength absorbent material enclosed by an envelope of wet strength tissue. The absorbent pad is preferably enclosed between a liquid-retaining backsheet and a liquid-pervious topsheet secured in superposed relation to the liquid-retaining backsheet. Because the wet strength tissue envelope surrounding the absorbent core material tends to cling to the wetted pad after removal of the liquid-retaining backsheet, it tends to prevent hydraulic erosion of the absorbent media and therefore interferes with pad flushability. If a non-wet strength tissue is utilized on one or both sides of the absorbent media it will readily dissociate upon immersion in water and thereby promote pad flushability. However, such an absorbent pad lacks integrity in use due to the low strength of the absorbent media employed.
    Type: Grant
    Filed: November 19, 1974
    Date of Patent: April 27, 1976
    Assignee: The Procter & Gamble Company
    Inventor: Robert C. Duncan