Patents by Inventor Belton R. Williams

Belton R. Williams 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).

  • Rerefining of used motor oils
    Patent number: 4101414
    Abstract: Screened and drained used lubricating oil stock is predistilled in a steam stripping still for about 4 hours or more. The thus predistilled used oil then flows to an evaporator for a vacuum distillation at a temperature below the cracking temperature of the stock, about 480.degree.-650.degree. F., to effect an evaporation of the used lubricating oil and its separation from a concentrate by-product of heavy lube hydrocarbons and additives.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: July 18, 1978
    Assignee: Unitech Chemical Inc.
    Inventors: Yang J. Kim, Belton R. Williams