Patents by Inventor Dale W. Sullivan

Dale W. Sullivan 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).

  • Well screen
    Patent number: 4550778
    Abstract: A well screen is provided, for insertion into a well, for screening out sand and other particles from the well, and for connection at its upper end to a pipe for delivering water or other liquid up from the well, with the well screen having a skin with slits in it for passage of liquid therethrough, and with the skin having internal rigidifying supports. The skin is provided with a surface area increase in the form of undulations preferably of sawtooth configuration throughout its surface, and is preferably thinwalled. The screen is preferably of thermoplastic construction.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: November 5, 1985
    Assignee: CertainTeed Corporation
    Inventors: Dale W. Sullivan, Kermit W. Janssen, Andrew Mitchell