Patents by Inventor Ralph Dale Triplett, II

Ralph Dale Triplett, II 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 4-aminodiphenylamine intermediates
    Patent number: 7183439
    Abstract: The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps: a. bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and b. reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising a strong organic base, or equivalent thereof, and an oxidant comprising hydrogen peroxide in an amount of from about 0.01 to about 0.60 moles of hydrogen peroxide to moles of nitrobenzene.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: February 27, 2007
    Assignee: Flexsys America L.P.
    Inventors: Ralph Dale Triplett, II, Roger Keranen Rains
  • Process for preparing 4-aminodiphenylamine intermediates
    Patent number: 6583320
    Abstract: The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising an inorganic salt or metal organic salt having a cation that would be a suitable cation of a strong inorganic base, an oxidant and an organic base, the mixture not including a reaction product of betaine and a strong inorganic base.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: June 24, 2003
    Assignee: Flexsys America L.P.
    Inventors: Ralph Dale Triplett, II, Roger Keranen Rains
  • Process for preparing 4-aminodiphenylamine intermediates
    Patent number: 6395933
    Abstract: The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising a strong base and a suitable phase transfer catalyst. Certain phase transfer catalysts may also function as the strong base.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: May 28, 2002
    Assignee: Flexsys America, L.P.
    Inventors: Ralph Dale Triplett, II, Roger Keranen Rains