Patents by Inventor David Stelling

David Stelling 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).

  • Analytical apparatus
    Patent number: 4212845
    Abstract: Apparatus for separating a stream of flowing liquid in a conduit into segments separated by gas bubbles of a known or at least controllable size includes a chamber communicating with the interior of the conduit and a duct of smaller cross section than the chamber, which projects into the chamber and is connectable to a source of gas under pressure: the size of the gas chamber, can be adjusted to change the rate at which the gas bubbles are injected and thus vary the length of the liquid segments.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: July 15, 1980
    Assignee: The Rank Organisation Limited
    Inventors: David Stelling, David H. Barker, Terence E. Weston