Patents by Inventor Harold E. Hartzler

Harold E. Hartzler 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).

  • Reflux condenser
    Patent number: 4333523
    Abstract: Disclosed is a novel apparatus for use in the rapid refluxing of low boiling liquids. The apparatus comprises a central chamber for the reception of hot gases from a reaction vessel, the chamber being surrounded by a cooling jacket. The central chamber comprises a lower primary condenser of 2 or more bulbous portions connected to and in fluid communication with each other and with a curvilinear column serving as a secondary condenser.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: June 8, 1982
    Assignee: Miles Laboratories, Inc.
    Inventor: Harold E. Hartzler
  • 2,5-Dioxo-3H,6H-furo[(3,2-b]furan-3a,6a-diacetic acid and salts thereof
    Patent number: 4231939
    Abstract: Disclosed is the title compound having the structural formula: ##STR1## This compound in which M is hydrogen, an alkali metal or ammonium, has utility as a chelating agent which exhibits stability constants with various metal ions which are intermediate between those of EDTA and citric acid.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: November 4, 1980
    Assignee: Miles Laboratories, Inc.
    Inventor: Harold E. Hartzler
  • 3-Substituted salicylamides
    Patent number: 4140769
    Abstract: Novel 3-substituted salicylamides having increased analgesic activity and prolonged analgesic activity are disclosed.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: February 20, 1979
    Assignee: Miles Laboratories, Inc.
    Inventors: Robert N. Schut, Harold E. Hartzler, Edgar O. Snoke, John W. Van Dyke, Jr.