Patents by Inventor Steven Chamberlin

Steven Chamberlin 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 the isomerization of 2,2,4,4-tetraalkylcyclobutane-1,3-diols
    Patent number: 8394997
    Abstract: Disclosed is a process for the isomerization of 2,2,4,4-tetraalkylcyclobutane-1,3-diols, such as 2,2,4,4-tetramethylcyclobutane-1,3-diol, by contacting the diol with a supported ruthenium catalyst in the presence of hydrogen at elevated pressures and temperatures. The process is carried under conditions in which there is no net production of 2,2,4,4-tetraalkylcyclobutane-1,3-diol. The process may be carried out in the presence or absence of a solvent and in the liquid or vapor phase.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Eastman Chemical Company
    Inventors: Zhufang Liu, Lori Cooke Ensor, Kelmara Khadene Kelly, Jerome Leonard Stavinoha, Jr., Kim Steven Chamberlin, Charles Everette Kelly, Carey Dan Ashcroft, Charles Edwan Sumner, Jr.
  • PROCESS FOR THE ISOMERIZATION OF 2,2,4,4-TETRAALKYLCYCLOBUTANE-1,3-DIOLS
    Publication number: 20120149948
    Abstract: Disclosed is a process for the isomerization of 2,2,4,4-tetraalkylcyclobutane-1,3-diols, such as 2,2,4,4-tetramethylcyclobutane-1,3-diol, by contacting the diol with a supported ruthenium catalyst in the presence of hydrogen at elevated pressures and temperatures. The process is carried under conditions in which there is no net production of 2,2,4,4-tetraalkylcyclobutane-1,3-diol. The process may be carried out in the presence or absence of a solvent and in the liquid or vapor phase.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 14, 2012
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Zhufang Liu, Lori Cooke Ensor, Kelmara Khadene Kelly, Jerome Leonard Stavinoha, JR., Kim Steven Chamberlin, Charles Everette Kelly, Carey Dan Ashcroft, Charles Edwan Sumner, JR.
  • High solvating cyclohexane dicarboxylate diesters plasticizers
    Patent number: 7973194
    Abstract: Diesters of 1,4-cyclohexane dicarboxylate are surprisingly more efficient PVC plasticizers and fuse PVC faster and at a lower temperature than similar phthalates or terephthalate diesters. Hydrogenated orthophthalate diesters are slower fusing, i.e., require higher temperatures, than do the corresponding orthophthalate diesters.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: July 5, 2011
    Assignee: Eastman Chemical Company
    Inventors: Nancy Ellen Kinkade, Kim Steven Chamberlin, David Justin Olsen, Mark Stephen Holt, Martin James Stimpson, Charles Everette Kelly
  • Process for the Preparation of Iopamidol
    Publication number: 20070078281
    Abstract: The present invention discloses a process for the preparation of pure non-ionic contrast agents. The invention also includes a method for purifying the non-ionic contrast agents.
    Type: Application
    Filed: August 16, 2006
    Publication date: April 5, 2007
    Applicant: BRACCO IMAGING S.P.A.
    Inventors: Richard Lorenzini, Ashok Bhatia, Steven Chamberlin, Keith Drengler, John Hufnagel, Xiu Wang
  • Process for the preparation of iopamidol
    Publication number: 20050192465
    Abstract: The present invention discloses a process for the preparation of pure non-ionic contrast agents. The invention also includes a method for purifying the non-ionic contrast agents.
    Type: Application
    Filed: February 24, 2005
    Publication date: September 1, 2005
    Applicant: Bracco Imaging S.p.A.
    Inventors: Richard Lorenzini, Ashok Bhatia, Steven Chamberlin, Keith Drengler, John Hufnagel, Xiu Wang
  • Preparation of mixtures of benzoxazolyl-stilbene compounds
    Patent number: 6177574
    Abstract: Disclosed is a process for the preparation of a mixture of benzoxazolyl-stilbene compounds by the reaction of unsubstituted 4,4′-bis(benzoxazol-2-yl)stilbene with a substituted o-aminophenol or o-aminonaphthol to obtain a mixture comprising the unsubstituted 4,4′-bis(benzoxazol-2-yl)stilbene and at least one substituted 4,4′-bis(benzoxazol-2-yl)stilbene, 4-naphthoxazol-2-yl-4′-benzoxazol-2-ylstilbene and/or 4,4′-bis(naphthoxazol-2-yl)stilbene. These mixtures are useful as fluorescent brightening agents and light stabilizers for synthetic polymeric materials such as polyesters, polyamide and polyolefin textile materials and shaped articles.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: January 23, 2001
    Assignee: Eastman Chemical Company
    Inventor: Kim Steven Chamberlin
  • Selective alkylation of an alcohol substituted phenol compound
    Patent number: 5731463
    Abstract: The present invention relates to a process for the selective alkylation of intermediates of betaxolol.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: March 24, 1998
    Assignee: Abbott Laboratories
    Inventors: Xiu C. Wang, Ashok V. Bhatia, Steven Chamberlin, Luping Liu