Patents by Inventor William C. Drinkard

William C. Drinkard 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).

  • Process for the production of cyclohexyladipates and adipic acid
    Patent number: 5374767
    Abstract: Cyclohexyladipates are formed in a staged reactor, e.g. a reactive distillation column. A mixture containing a major amount of benzene and a minor amount of cyclohexene is fed to the lower portion of the reaction zone and adipic acid is fed to the upper portion of the reaction zone, cyclohexyladipates are formed and removed from the lower portion of the reaction zone and benzene is removed from the upper portion of the reaction zone. The reaction zone also contains an acid catalyst.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: December 20, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William C. Drinkard, Gerald C. Grunewald, Ronald Reimer
  • Process for the production of cyclohexyladipates and adipic acid
    Patent number: 5321155
    Abstract: Cyclohexyladipates are produced by reacting a mixture containing a major amount of benzene and minor amounts of cyclohexene, adipic acid and an acid catalyst.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: June 14, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William C. Drinkard, Gerald C. Grunewald