Patents by Inventor Robert G. Rowland

Robert G. Rowland 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).

  • Diaryl amine antioxidants prepared from branched olefins
    Patent number: 11518732
    Abstract: Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: December 6, 2022
    Assignee: LANXESS Corporation
    Inventor: Robert G. Rowland
  • ALKYLATED ALKOXYDIARYLAMINE ANTIOXIDANTS
    Publication number: 20200407658
    Abstract: Alkylated diaryl amines further substituted by an alkoxy group on one or more aryl carbon atoms exhibit excellent antioxidant activity in lubricant compositions.
    Type: Application
    Filed: September 15, 2020
    Publication date: December 31, 2020
    Applicant: LANXESS Solutions US Inc.
    Inventor: Robert G. Rowland
  • Alkylated alkoxydiarylamine antioxidants
    Patent number: 10808197
    Abstract: Alkylated diaryl amines further substituted by an alkoxy group on one or more aryl carbon atoms exhibit excellent antioxidant activity in lubricant compositions.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: October 20, 2020
    Assignee: LANXESS Solutions US Inc.
    Inventor: Robert G. Rowland
  • Lubricant compositions stabilized by mixtures of diarylamine and hydroxydiarylamine antioxidants
    Patent number: 10723969
    Abstract: Lubricant compositions comprising a lubricating oil and a mixture of one or more alkylated diarylamine and one or more alkylated hydroxydiarylamine exhibit excellent antioxidant and deposit control performance.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: July 28, 2020
    Assignee: LANXESS Solutions US Inc.
    Inventors: Robert G. Rowland, Subban Ramesh
  • DIARYL AMINE ANTIOXIDANTS PREPARED FROM BRANCHED OLEFINS
    Publication number: 20200165188
    Abstract: Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
    Type: Application
    Filed: November 22, 2019
    Publication date: May 28, 2020
    Applicant: LANXESS Solutions US Inc.
    Inventor: Robert G. Rowland
  • Alkylated 3-hydroxydiphenylamine antioxidants
    Patent number: 10563145
    Abstract: Certain alkylated 3-hydroxyphenylamine antioxidants wherein one phenyl is substituted by at least one hydroxyl group at the 3-position relative to the amine and the other phenyl is substituted by at least one substituent having 4 or more carbon atoms are surprisingly effective antioxidants, especially in lubricating oils.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: February 18, 2020
    Assignee: LANXESS Solutions US Inc.
    Inventor: Robert G. Rowland
  • Diaryl amine antioxidants prepared from branched olefins
    Patent number: 10487043
    Abstract: Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 26, 2019
    Assignee: LANXESS Solutions US Inc.
    Inventor: Robert G. Rowland
  • ALKYLATED ALKOXYDIARYLAMINE ANTIOXIDANTS
    Publication number: 20180079984
    Abstract: Alkylated diaryl amines further substituted by an alkoxy group on one or more aryl carbon atoms exhibit excellent antioxidant activity in lubricant compositions.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 22, 2018
    Inventor: Robert G. Rowland
  • LUBRICANT COMPOSITIONS STABILIZED BY MIXTURES OF DIARYLAMINE AND HYDROXYDIARYLAMINE ANTIOXIDANTS
    Publication number: 20180079987
    Abstract: Lubricant compositions comprising a lubricating oil and a mixture of one or more alkylated diarylamine and one or more alkylated hydroxydiarylamine exhibit excellent antioxidant and deposit control performance.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 22, 2018
    Inventors: Robert G. Rowland, Subban Ramesh
  • ALKYLATED 3-HYDROXYDIPHENYLAMINE ANTIOXIDANTS
    Publication number: 20180079985
    Abstract: Certain alkylated 3-hydroxyphenylamine antioxidants wherein one phenyl is substituted by at least one hydroxyl group at the 3-position relative to the amine and the other phenyl is substituted by at least one substituent having 4 or more carbon atoms are surprisingly effective antioxidants, especially in lubricating oils.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 22, 2018
    Inventor: Robert G. Rowland
  • Selective alkylation method for producing p, p?-di-alkylated diphenylamine antioxidants
    Patent number: 9890346
    Abstract: Liquid diphenylamine compositions comprising predominately p,p?-di-alkylated diphenylamines and low amounts of mono-alkylated diphenylamines are prepared by adding an olefin to a mixture comprising mono-alkylated diphenylamines, di-alkylated diphenylamines, Lewis acid catalyst and an amount of another olefin sufficient to suppress dealkylation of the alkylated diphenylamines.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: February 13, 2018
    Assignee: LANXESS Solutions US Inc.
    Inventor: Robert G Rowland
  • DIARYL AMINE ANTIOXIDANTS PREPARED FROM BRANCHED OLEFINS
    Publication number: 20170015618
    Abstract: Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
    Type: Application
    Filed: June 22, 2016
    Publication date: January 19, 2017
    Inventor: Robert G. Rowland
  • Selective Alkylation Method for Producing p, p'-Di-alkylated Diphenylamine Antioxidants
    Publication number: 20160017252
    Abstract: Liquid diphenylamine compositions comprising predominately p,p?-di-alkylated diphenylamines and low amounts of mono-alkylated diphenylamines are prepared by adding an olefin to a mixture comprising mono-alkylated diphenylamines, di-alkylated diphenylamines, Lewis acid catalyst and an amount of another olefin sufficient to suppress dealkylation of the alkylated diphenylamines.
    Type: Application
    Filed: June 29, 2015
    Publication date: January 21, 2016
    Inventor: Robert G. Rowland
  • Cross products and co-oligomers of phenylenediamines and aromatic amines as antioxidants for lubricants
    Patent number: 8987515
    Abstract: Radical initiated reactions of phenylenediamines with alkylated aromatic amines produce an antioxidant mixture containing cross reaction products of the phenylenediamines and alkylated aromatic amines which are useful, for example, as antioxidants, stabilizers, and antiozonants for lubricants, electronic chemicals, rubbers, urethanes and other polymer resins, crop protection, pharmaceuticals, dyes and toners.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: March 24, 2015
    Assignee: Chemtura Corporation
    Inventor: Robert G. Rowland
  • Lubrication and lubricating oil compositions
    Patent number: 8703682
    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: Grant
    Filed: October 29, 2009
    Date of Patent: April 22, 2014
    Assignee: Infineum International Limited
    Inventors: Joseph P. Hartley, Robert G. Rowland, Jie Cheng, Jacob Emert, Joseph Stieber
  • Alkylated 1,3-benzenediamine compounds and methods for producing same
    Patent number: 8563489
    Abstract: An alkylated 1,3-benzenediamine compound used as a deposit-control lubricant additives for organic materials including lubricating oil, gasoline, and diesel fuels. The invention improves the oxidative stability of the lubricants and fuels by adding the alkylated 1,3-benzenediamine compound. The alkylated 1,3-benzenediamine compound is formed using a catalytic hydrogenation that alkylates the 4 and/or 6 position of the central aromatic ring.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: October 22, 2013
    Assignee: Chemtura Corporation
    Inventors: Robert G. Rowland, Joseph F. Stieber, Clifford M. Pratt, Ronald D. Abbott
  • Additive compositions
    Patent number: 8530397
    Abstract: Compositions in the form of lubricating oil compositions, greases, fuels or functional fluids containing, in the form of Michael adducts, N-substituted phenylenediamine additives in which at least one of the substituents on the N atoms carries a carbonyl group that is connected to an alkyl, alkoxyalkyl, or alkylthioalkyl group either directly or via an oxygen atom.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: September 10, 2013
    Assignees: Infineum International Limited, Chemtura Corporation
    Inventors: Tushar Kanti Bera, Rolfe J. Hartley, Jacob Emert, Jie Cheng, Theodore E. Nalesnik, Robert G. Rowland
  • Reaction products of mercaptobenzothiazoles, mercaptothiazolines, and mercaptobenzimidalzoles with epoxides as lubricant additives
    Patent number: 8097731
    Abstract: A composition comprising: (A) a lubricant, and (B) at least one alcohol that is the reaction product of mercaptobenzothiazoles, mercaptothiazolines, or mercaptobenzimidazoles with various epoxies.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: January 17, 2012
    Assignee: Crompton Corporation
    Inventors: Robert G. Rowland, Ronald D. Abbott
  • 1,3 dithiolane-2-thione additives for lubricants and fuels
    Patent number: 8048832
    Abstract: Fuels, especially hydrocarbon fuels, and lubricants, especially lubricating oils, contain a class of anti-corrosion, anti-wear, anti-fatigue, and extreme pressure additives that are derived from 1,3-dithiolane-2-thiones.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: November 1, 2011
    Assignee: Chemtura Corporation
    Inventor: Robert G. Rowland
  • 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