Patents by Inventor John E. Corn, Jr.

John E. Corn, Jr. 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 isobutyric acid anhydride
    Patent number: 4303594
    Abstract: A process for the production of isobutyric acid anhydride in which propylene is initially carbonylated in the presence of a substantial molar excess of liquid anhydrous hydrogen fluoride to provide a reaction mixture of isobutyroyl fluoride and unreacted hydrogen fluoride. Following distillation of the reaction mixture to recover a recycle stream of hydrogen fluoride, the isobutyroyl fluoride residue is partially hydrolyzed in the presence of a hydrogen fluoride acceptor resulting in a hydrolysis product consisting essentially of isobutyroyl fluoride, isobutyric acid anhydride and a hydrogen fluoride complex of said acceptor. Following removal of the solid complex, the hydrolysis product is fractionally distilled to yield an overhead fraction of isobutyroyl fluoride for reuse in the hydrolysis reaction.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: December 1, 1981
    Assignee: Ashland Oil, Inc.
    Inventors: Richard V. Norton, Lee R. Zehner, Ralph F. Pascoe, John E. Corn, Jr., Dace Grote
  • Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene
    Patent number: 4049721
    Abstract: Certain impurities found in 9,9-bis(4-hydroxyphenyl)-fluorene are removed by treatment of the latter with a methanol-water mixture and thereafter isolating the purified fluorene.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: September 20, 1977
    Assignee: General Electric Company
    Inventors: John E. Corn, Jr., Howard J. Klopfer
  • Process for the purification of 9,9-bis(4-hydroxyphenyl)-fluorene
    Patent number: 4024194
    Abstract: Certain impurities found in 9,9-bis(4-hydroxyphenyl)-fluorene are removed by treatment of the latter with nitromethane in which the impurity is soluble, and thereafter isolating the purified fluorene.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: May 17, 1977
    Assignee: General Electric Company
    Inventor: John E. Corn, Jr.