Patents by Inventor Edward L. Graeber

Edward L. Graeber 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).

  • Catalyst and process for the production of 3-cyano-3,5,5-trialkylcyclohexanone
    Patent number: 5183915
    Abstract: The production of 3-cyano-3,5,5-trialkylcyclohexanone from the reaction of 3,5,5-trialkylcyclohexenone and hydrocyanide at elevated temperature and in the presence of a catalytic amount of an onium cyanide, is disclosed herein.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: February 2, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Christian Forguy, Frederick J. Goetz, Edward L. Graeber, Michael J. Lindstrom
  • Process for the preparation of 2,2'-dithiobis (benzothiazole)
    Patent number: 4859778
    Abstract: An improved process for the manufacture of 2,2'-dithiobis(benzothiazole). More particularly, the invention relates to an improved process for preparing 2,2'-dithiobis(benzothiazole) using various nonionic and cationic surfactants to reduce or eliminate the formation of large particles in the product.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: August 22, 1989
    Assignee: Pennwalt Corporation
    Inventors: Edward L. Graeber, Michael J. Lindstrom