Patents by Inventor James W. Barr, Jr.

James W. Barr, Jr. 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).

  • Reverse flow heat exchangers
    Patent number: 4143702
    Abstract: A heat exchanger wherein the hot and cold sides are arranged in side-by-side relationship, both sides being connected to a reactor by properly valved pipes, and means providing for a forward flow with reactor influent flowing through one side to the reactor and thermally conditioned liquid exiting from the reactor through the other side. Valves are selectively operable to reverse this flow.One form of the invention utilizes a pair of heat exchangers utilizing a third heat transfer medium.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: March 13, 1979
    Assignee: Sterling Drug, Inc.
    Inventor: James W. Barr, Jr.
  • Process for removing calcium oxalate scale
    Patent number: 4108680
    Abstract: A mixture of nitric acid and manganese dioxide is effective in removing calcium oxalate scale from metal surfaces.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: August 22, 1978
    Assignee: Sterling Drug Inc.
    Inventor: James W. Barr, Jr.