Patents by Inventor Keith E. Goehring

Keith E. Goehring 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).

  • Preparation of 1H-indol-1-amines
    Patent number: 6512125
    Abstract: The synthesis of memory enhancing, analgetic, and antidepressant N-alkyl-N-pyridinyl-1H-indol-1-armines is described.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: January 28, 2003
    Assignee: Aventis Pharmaceuticals Inc.
    Inventors: Thomas B. Lee, Keith E. Goehring
  • Preparation of N-alkyl-N-pyridinyl-1H-indol-1-amines
    Patent number: 5644062
    Abstract: The synthesis of memory enhancing, analgetic, and antidepressant N-alkyl-N-pyridinyl-1H-indol-1-amines is described.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 1, 1997
    Assignee: Hoechest Marion Roussel, Inc.
    Inventors: Thomas B. Lee, Keith E. Goehring
  • Preparation of N-alkyl-N-pyridinyl-1H-indol-1-amines
    Patent number: 5459274
    Abstract: The synthesis of memory enhancing, analgetic, and antidepressant N-alkyl-N-pyridinyl-1H-indol-1-amines is described.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: October 17, 1995
    Assignee: Hoechst-Roussel Pharmaceuticals Inc.
    Inventors: Thomas B. Lee, Keith E. Goehring
  • Method for the preparation of 9-amino-1,2,3,4-tetrahydroacridine
    Patent number: 5155226
    Abstract: A method of preparing 9-amino-1,2,3,4-tetrahydroacridine by the reaction of 2-aminobenzonitrile and cyclohexanone with p-toluenesulfonic acid monohydrate in xylenes is disclosed.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: October 13, 1992
    Assignee: Hoechst-Roussel Pharmaceuticals Incorporated
    Inventors: Thomas B. K. Lee, Keith E. Goehring
  • Method of reducing a carbonyl containing acridine
    Patent number: 5053513
    Abstract: A method of reducing a carbonyl containing acridine of the formula ##STR1## where n is 1, 2 or 3; X is hydrogen, loweralkyl, loweralkoxy, halogen, hydroxy, trifluoromethyl, or NR.sub.3 R.sub.4 where R.sub.3 and R.sub.4 are independently hydrogen or loweralkyl; R is hydrogen or loweralkyl and R.sub.1 is hydrogen, loweralkyl, diloweralkylaminoloweralkyl, arylloweralkyl, diarylloweralkyl, furylloweralkyl, thienylloweralkyl, oxygen-bridged arylloweralkyl, oxygen-bridged diarylloweralkyl, oxygen-bridged furylloweralkyl or oxygen-bridged thienylloweralkyl, is disclosed.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 1, 1991
    Assignee: Hoechst-Roussel Pharmaceuticals Incorporated
    Inventors: Thomas B. K. Lee, George E. Lee, George S. K. Wong, Donna M. Borek, Keith E. Goehring