Patents by Inventor David E. Butterworth

David E. Butterworth 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: 6213124
    Abstract: A surgical drape includes a sealable pouch to collect run-off from a surgical site. The pouch is open to receive fluid during a surgical procedure. When the procedure is completed, the pouch is sealed to prevent leakage of the fluid and to permit safe disposal of the contaminated drape. Preferably, the pouch is sealed with an interlocking ridge-and-channel structure of the type commonly used in food and sandwich bags.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: April 10, 2001
    Assignee: Johnson & Johnson Medical, Inc.
    Inventor: David E. Butterworth
  • Patent number: 5648141
    Abstract: A debridement sponge made from a nonwoven fabric comprising, in a preferred form, yarn-like strands of bleached cotton fibers. In the preferred form, the strands are interconnected at multiple junctures to form fewer than 31 generally rectangular apertures per cm.sup.2. Moreover, each aperture has an area of 1.3 mm.sup.2. Furthermore, the fabric has a Calculated Strand Density of 0.17l g/cc, a Clarity Index of at least 0.75, and an Absorbent Capacity of at least 7 grams of a colored, aqueous, saline solution per gram of the fabric when compressed under a pressure of 3.3 g/cm.sup.2. Plug Harshness and Compression Recovery of the fabric are excellent.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: July 15, 1997
    Assignee: Chicopee
    Inventors: David E. Butterworth, John Dyer, John W. Kennette