Patents by Inventor Duane Mark Schufeldt

Duane Mark Schufeldt 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).

  • Hydroquinone to inhibit fouling of epichlorohydrin equipment
    Patent number: 6024839
    Abstract: A method of inhibiting fouling of one or more pieces of equipment for processing crude epichlorohydrin by treating at least one epichlorohydrin stream entering or exiting the one or more pieces of equipment with hydroquinone as an antifoulant.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: February 15, 2000
    Assignee: Shell Oil Company
    Inventor: Duane Mark Schufeldt