Patents by Inventor Foster L. Wade

Foster L. Wade 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).

  • Performance grade asphalt and methods
    Patent number: 6203606
    Abstract: The present invention relates to Performance Grade asphalt and a method for producing the same. The process includes adding a performance grade modifier and aggregates to an asphalt cement. The performance grade modifier reduces the high temperature limit and the low temperature limit of the performance grade asphalt in a ratio of about 1:1. A vacuum distilled component of recycled used lubricating oil is used as the performance grade modifier. The recycled used lubricating oil is added to the base oil and aggregate in sufficient quantities to achieve the selected operating temperature range.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: March 20, 2001
    Assignee: Texaco Inc.
    Inventors: Bruce R. Bond, Foster L. Wade