Patents by Inventor Joseph Stieber

Joseph Stieber 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).

  • Lubrication and Lubricating Oil Compositions
    Publication number: 20110105372
    Abstract: Tetra-alkylated phenylenediamine compounds useful as ashless TBN sources for lubricating oil compositions that are compatible with fluoroelastomeric engine seal materials and meet copper corrosion requirements, and lubricating oil compositions containing such phenylenediamine compounds.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Inventors: Joseph P. Hartley, Robert G. Rowland, Jie Cheng, Jacob Emert, Joseph Stieber
  • Rubber compositions
    Patent number: 7879934
    Abstract: A rubber composition is disclosed wherein the rubber composition contains at least an effective amount of at least one substituted or unsubstituted diaryl amine-containing compound having at least one substituted or unsubstituted, saturated or partially saturated C5-C30 ring structure optionally containing one or more heteroatoms fused to at least one of the aryl rings.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: February 1, 2011
    Assignee: Chemtura Corporation
    Inventors: Theodore E. Nalesnik, John Kounavis, Joseph Stieber
  • Rubber compositions
    Publication number: 20090048376
    Abstract: A rubber composition is disclosed wherein the rubber composition contains at least an effective amount of at least one substituted or unsubstituted diaryl amine-containing compound having at least one substituted or unsubstituted, saturated or partially saturated C5-C30 ring structure optionally containing one or more heteroatoms fused to at least one of the aryl rings.
    Type: Application
    Filed: August 16, 2007
    Publication date: February 19, 2009
    Inventors: Theodore E. Nalesnik, John Kounavis, Joseph Stieber
  • Antiozonant blends
    Publication number: 20070260000
    Abstract: An antiozonant mixture is disclosed wherein said mixture comprises at least two compounds, (A) at least one of which is of the structure and (B) at least one other of which is of the structure wherein R1 is a straight chain, branched, or cyclic alkyl group comprising from three to seven carbon atoms, and R2 is a straight chain, branched, or cyclic alkyl group comprising at least eleven carbon atoms.
    Type: Application
    Filed: May 2, 2006
    Publication date: November 8, 2007
    Inventors: Martin Hannon, Russell Malz, Joseph Stieber
  • Direct alkylation of N-alkyl-N'-phenyl-p-phenylenediamine
    Publication number: 20070173668
    Abstract: A single-step process is disclosed for the ring alkylation of at least one N-alkyl-N?-phenyl-phenylenediamine with at least one olefin wherein the process comprises heating a mixture of the N-alkyl-N?-phenyl-phenylenediamine(s) and olefin(s) in the presence of a catalytic amount of at least one alkyl aluminum halide at a temperature of from about 50 to about 350° C. in a sealed vessel for from about one to about 30 hours.
    Type: Application
    Filed: January 24, 2006
    Publication date: July 26, 2007
    Inventors: Jin-Yun Wang, Huiling Ding, Joseph Stieber
  • Alkylation of N'-phenyl-N-alkylphenylenediamines in ionic liquid, N'-phenyl-N-alkyl (alkylphenylene) diamines produced thereby, and lubricant compositions containing same
    Publication number: 20070135657
    Abstract: A process for alkylation of a N?-phenyl-N-alkyl-p-phenylenediamine of specified formula in an ionic liquid unexpectedly produces a N?-phenyl-N-alkyl(alkylphenylene)diamine of a second specified formula. The use of an inorganic liquid permits convenient separation of the alkylated reaction product from the reaction mixture.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Inventors: Steven Hobbs, Joseph Stieber
  • Ring alkylation of aniline or an aniline derivative using ionic liquid catalysts
    Publication number: 20070135656
    Abstract: A process for ring-alkylating aniline or an aniline derivative in which aniline or an aniline derivative is reacted with an alkylating agent in the presence of an ionic liquid which includes a Lewis acid and a quaternary cation, to produce a ring-alkylated alkylaniline or a ring-alkylated aniline derivative. The use of an ionic liquid permits convenient separation of the alkylated reaction product from the reactants.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 14, 2007
    Inventors: Steven Hobbs, Venkatramanan Madabusi, Jin-Yun Wang, Joseph Stieber