Patents by Inventor Ralph X. Ewall

Ralph X. Ewall 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).

  • Wound dressing with hydrophilic absorbent layer
    Patent number: 4977892
    Abstract: Provided is a wound dressing able to absorb significant quantities of wound exudate emitted from an open wound. In one construction, it has the capability of allowing moisture contained in the exudate to be transpired out of the dressing, thereby lengthening the useful life of the dressing and minimizing macerations.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: December 18, 1990
    Assignee: The B. F. Goodrich Company
    Inventor: Ralph X. Ewall