Patents by Inventor Donald Alan Southgate

Donald Alan Southgate 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).

  • Method and apparatus for launching pipeline clearing spheres
    Patent number: 4050955
    Abstract: Pipeline tool for closing an open end of a pipeline and which is suitable for use with a pipeline clearing sphere for clearing a pipeline has a tubular member for holding one or two spheres side by side and an aperture in the wall of the tubular member to release gas trapped therein and pipes for supplying compressed air to launch the spheres.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: September 27, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Donald Alan Southgate
  • Pipeline tool for launching two pipeline clearing spheres
    Patent number: 4011620
    Abstract: Pipeline tool for closing an open end of a pipeline and which is suitable for use with a pipeline sphere for clearing a pipeline has a tubular member for holding two spheres side by side and pipes for supplying compressed air to launch the spheres individually.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: March 15, 1977
    Assignee: The British Petroleum Company Limited
    Inventor: Donald Alan Southgate