Patents by Inventor Terry J. Koltermann

Terry J. Koltermann 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).

  • Lubricating grease
    Patent number: 5891830
    Abstract: A heavy-duty lubricating grease is shown which includes a synthetic fluid base and a thickener system. The heavy-duty grease can be used in both rolling element and journal type rock bit bearings to drill in heavy-duty, high temperature applications, such as in the bearing structures of rock bits used to drill hot subterranean formations.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: April 6, 1999
    Assignee: Baker Hughes Incorporated
    Inventors: Terry J. Koltermann, Thomas F. Willey
  • Bearings grease for rock bit bearings
    Patent number: 5015401
    Abstract: A heavy duty lubricating grease as shown which includes a multi-purpose heavy duty hydrocarbonaceous lubricant thickened by an alkaline soap to form a lubricating grease, molybdenum disulfide and powdered calcium fluoride. The heavy duty grease can be used in a journal bearing of a drill bit in heavy duty, high temperature applications, such as journal bearings on its used to drill hot subterranean formations.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: May 14, 1991
    Assignee: Hughes Tool Company
    Inventors: David K. Landry, Terry J. Koltermann