Patents by Inventor Raymond F. Madden

Raymond F. Madden 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).

  • Easy-opening can end
    Patent number: 4196823
    Abstract: An easy-opening can end having a venting aperture and a dispensing aperture each closed by a respective push-in tab, the relationship between the two apertures and the two tabs being such that, should the venting tab close or not be sufficiently opened after depression, depression of the dispensing tab causes the dispensing tab to contact the venting tab to open the latter and to hold it open.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: April 8, 1980
    Assignee: Comalco Products Pty. Limited
    Inventors: Raymond F. Madden, Dennis B. Moreau