Patents by Inventor John R. Siegman

John R. Siegman 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 preparation of 2-(6-methoxy-2-naphthyl)propionic acid and intermediates therefor utilizing 2,6-diisopropylnaphthalene
    Patent number: 5286902
    Abstract: A process is disclosed for the synthesis of 2-(6-methoxy-2-naphthyl)propionic acid that utilizes 2,6-diisopropylnaphthalene.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: February 15, 1994
    Assignee: Koch Industries, Inc.
    Inventors: Dustin K. James, Andrew P. Komin, John R. Siegman
  • Dehalogenation of polychlorinated biphenyls and other related compounds
    Patent number: 4910353
    Abstract: Polychlorobiphenyls and other toxic halogenated polyaromatic substances such as various halogenated pesticides, herbicides, and the like, are dehalogenated through the use of a strong base and various sulfur-containing compounds. The dechlorinated residues either form polymers which are insoluble in aliphatic hydrocarbons and can thus be easily separated as through filtration, or can be separated from the solvent by distillation. The residues can be readily and safely disposed of as in an approved dump, or burned.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: March 20, 1990
    Assignee: Transformer Service, Inc.
    Inventor: John R. Siegman