Patents by Inventor Robert D. Dobson

Robert D. Dobson 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).

  • Tampon having a mensesphilic foam treated with a liquid lubricant
    Patent number: 4026292
    Abstract: Improving the handling characteristics of flexible, resilient, particulate polyurethane foam by adding a small quantity of liquid lubricant to the surface of the foam to prevent clumping. Applying as little as about 0.5 percent to about 20 percent by weight of a liquid lubricant such as mineral oil to the surface of the particulate foam facilitates more uniform filling of equal-volume containers with particles of said foam and reduces the container-to-container weight variation.
    Type: Grant
    Filed: September 17, 1974
    Date of Patent: May 31, 1977
    Assignee: The Procter & Gamble Company
    Inventors: James P. Hutchins, Robert D. Dobson