Patents by Inventor David R. Foresteer

David R. Foresteer 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).

  • Compositions of phosphorus derivatives of polyalkenylsuccinimides
    Patent number: 5194620
    Abstract: Phosphorus derivatives of polyalkenylsuccinimides and methods of use of such derivatives as antifoulants in liquid hydrocarbonaceous mediums, such as crude oil, during processing at elevated temperatures are disclosed. The derivatives are formed via reaction of a polyalkenylsuccinimide intermediate with formaldehyde and a phosphorus compound having at least one acidic hydrogen P-H bond. The intermediate is first formed via reaction of polyalkenylsuccinic anhydride and polyamine.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: March 16, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Paul V. Roling, David R. Foresteer, Bruce E. Wright