Patents by Inventor Charles W. Longstaff

Charles W. Longstaff 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).

  • Colostomy bag
    Patent number: 7678091
    Abstract: A colostomy bag provided with a stoma ring, a gas outlet and an external deodorizing filter in which a vertical baffle is provided intermediate the stoma ring and the gas outlet and extending from the upper marginal wall of the bag and a level slightly below the lowest point of the stoma ring. The baffle is designed to prevent feces from being squeezed sideways and upwardly into the gas outlet and clogging it.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: March 16, 2010
    Inventor: Charles W. Longstaff
  • Colostomy bag
    Publication number: 20080228155
    Abstract: A colostomy bag provided with a stoma ring, a gas outlet and an external deodorizing filter in which a vertical baffle is provided intermediate the stoma ring and the gas outlet and extending from the upper marginal wall of the bag and a level slightly below the lowest point of the stoma ring. The baffle is designed to prevent feces from being squeezed sideways and upwardly into the gas outlet and clogging it.
    Type: Application
    Filed: March 15, 2007
    Publication date: September 18, 2008
    Inventor: Charles W. Longstaff