Patents by Inventor Louis P. Verduce

Louis P. Verduce 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 preparing color-stable tertiary butyldiethanolamine
    Patent number: 5424482
    Abstract: Tertiary-butyldiethanolamine subject to color deterioration is purified and stabilized against color formation by vacuum distilling said amine at a pressure within the range of 1 to 50 mm.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: June 13, 1995
    Assignee: Elf Atochem N.A., Inc.
    Inventors: Thomas H. Overgaard, Louis P. Verduce
  • Purification and decolorization of off-color alkyl alkanolamines
    Patent number: 5208377
    Abstract: Off-color N-(C.sub.4 -C.sub.10)alkyl di(C.sub.2 -C.sub.3) alkanolamines purified and decolorized by vacuum distillation at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the presence of water and or water-soluble metal borohydride whereby the distilled alkanolamine has a reduced APHA color rating which is maintained on storage.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: May 4, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Thomas H. Overgaard, Louis P. Verduce