Patents by Inventor William Allan Dempster Logan

William Allan Dempster Logan 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).

  • Patent number: 6227252
    Abstract: A reinforced pipe and a method for constructing same wherein the reinforced pipe is comprised of an outer pipe concentrically positioned over an inner pipe. A honeycomb, reinforcing material which is comprised of rows of cells is positioned between the pipes with the longitudinal axis of each cell being aligned with a radius of the inner pipe. The outer pipe may be heat shrunk onto the honeycomb material or it may be split and expanded before positioning over the honeycomb material. Both the honeycomb material and the outer pipe are positioned along only a portion of the length of the inner pipe so that each end of the inner pipe is exposed to facilitate the joining of two adjacent lengths of reinforced pipe.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: May 8, 2001
    Assignee: Mobil Oil Corporation
    Inventor: William Allan Dempster Logan