Patents Examined by Samel Barts
  • Method of manufacturing alkylated diphenylamine compositions and products thereof
    Patent number: 6204412
    Abstract: A method of manufacturing an alkylated diphenylamine composition to generate an alkylated diphenylamine composition with relatively low amounts of unsubstituted diphenylamine, based on the total weight of substituted and unsubstituted diphenylamine in the alkylated diphenylamine composition. The method includes reaction of unsubstituted diphenylamine with at least two olefins. In at least some instances, the alkylated diphenylamine composition may be used, for example, as an antioxidant in a lubricating fluid or polymer composition.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: March 20, 2001
    Assignee: The B. F. Goodrich Company
    Inventor: John T. Lai