Patents by Inventor James J. Felfoldi

James J. Felfoldi 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).

  • Disposable diaper with wetness indicator
    Patent number: 4192311
    Abstract: A disposable article comprises a translucent sheet of substantially water impervious material and a moisture absorbent pad associated with the sheet. Also, a visual indicator is located proximate the sheet, and a mask is located between the indicator and sheet, the mask characterized when dry as masking the visibility of the indicator through the sheet, and further characterized when wet as unmasking the visibility of the indicator.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: March 11, 1980
    Inventor: James J. Felfoldi