Patents by Inventor H. Don Davis

H. Don Davis 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).

  • Uninhibited electrical insulating oil
    Patent number: 7666295
    Abstract: An uninhibited electrical insulating oil is prepared by blending a severely hydrotreated naphthenic distillate base oil having a viscosity of from about 50 to about 80 SSU at 38° C. and an aniline point from about 63° to about 84° C. with a solvent extracted, non-hydrogenated paraffinic distillate having at least 9.0 wt. % aromatic content.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: February 23, 2010
    Assignee: Ergon Refining, Inc.
    Inventors: John Kristopher Patrick, Lance A. Puckett, Jimmy M. Rasco, H. Don Davis
  • Aromatic solvents having aliphatic properties and methods of preparation thereof
    Patent number: 5908548
    Abstract: An aromatic solvent together with methods for its preparation are described. A composition includes a paraffin fraction in an amount of from approximately 9 LV % to approximately 15 LV %; a naphthene fraction in an amount of from approximately 35 LV % to approximately 55 LV %; and an alkylbenzene fraction in an amount of from approximately 8 LV % to approximately 16 LV %. The solvent provides advantages in that the high solvency that is typical of an aromatic solvent is combined with a narrow distillation range, a high flash point and higher boiling range that is typical of an aliphatic solvent.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: June 1, 1999
    Assignee: Ergon, Incorporated
    Inventors: Christopher S. Rucker, Steven J. Wantling, H. Don Davis, Jimmy Rasco