Patents by Inventor William B. Stephenson

William B. Stephenson 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).

  • Gas tester
    Patent number: 6584826
    Abstract: Apparatus for testing the quality of air in sources of compressed air in which a housing forms an elongated bore closed at one end by an elastomeric bag or balloon and at the other end by a check valve to form a chamber to hold a test strip which is chemically treated to change color or characteristics when air contaminants are present. The air to be tested is introduced through the valve to inflate the balloon and maintain the test strip under air pressure where it can be viewed through a transparent portion of the housing.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: July 1, 2003
    Inventors: William B. Stephenson, Craig W. Stephenson
  • Gas tester
    Publication number: 20020029607
    Abstract: Apparatus for testing the quality of air in sources of compressed air in which a housing forms an elongated bore closed at one end by an elastomeric bag or balloon and at the other end by a check valve to form a chamber to hold a test strip which is chemically treated to change color or characteristics when air contaminants are present. The air to be tested is introduced through the valve to inflate the balloon and maintain the test strip under air pressure where it can be viewed through a transparent portion of the housing.
    Type: Application
    Filed: August 6, 2001
    Publication date: March 14, 2002
    Inventors: William B. Stephenson, Craig W. Stephenson