Patents by Inventor Robert T. Fitzsimons

Robert T. Fitzsimons 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).

  • Method and apparatus for separating a target molecule from a liquid mixture
    Patent number: 7488422
    Abstract: A simulated moving bed apparatus and methods are described for continuously separating a target molecule from a liquid mixture, using a simulated moving bed system. The simulated moving bed system includes a plurality of filter cartridge modules in serial fluid communication. Each filter cartridge module includes a volume of stationary phase particulates adjacent a porous substrate layer. Each filter cartridge module also includes recirculation piping in fluid connection with a filter cartridge outlet and a filter cartridge inlet.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: February 10, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew W. Rabins, Kelly J. Gibbens, Masayuki Nakamura, Kannan Seshadri, Robert T. Fitzsimons, Jr., Larry J. Carson, Stephen M. Larsen
  • SINGLE PASS METHOD AND APPARATUS FOR SEPARATING A TARGET MOLECULE FROM A LIQUID MIXTURE
    Publication number: 20080264849
    Abstract: A single pass simulated moving bed apparatus and methods are described for continuously separating a target molecule from a liquid mixture, using a simulated moving bed system. The simulated moving bed system includes a plurality of filter cartridge modules in serial fluid communication. Each filter cartridge module includes a volume of stationary phase particulates adjacent a porous substrate layer. The volume of stationary phase particulates has a bed height of less than 1 centimeter.
    Type: Application
    Filed: July 11, 2008
    Publication date: October 30, 2008
    Inventors: Kelly J. GIBBENS, Masayuki Nakamura, Kannan Seshadri, Andrew W. Rabins, Larry J. Carson, Robert T. Fitzsimons
  • Single pass method and apparatus for separating a target molecule from a liquid mixture
    Patent number: 7413660
    Abstract: A single pass simulated moving bed apparatus and methods are described for continuously separating a target molecule from a liquid mixture, using a simulated moving bed system. The simulated moving bed system includes a plurality of filter cartridge modules in serial fluid communication. Each filter cartridge module includes a volume of stationary phase particulates adjacent a porous substrate layer. The volume of stationary phase particulates has a bed height of less than 1 centimeter.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: August 19, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Kelly J. Gibbens, Masayuki Nakamura, Kannan Seshadri, Andrew W. Rabins, Larry J. Carson, Robert T. Fitzsimons, Jr.
  • METHOD OF MAKING MACROPOROUS CATION EXCHANGE RESINS
    Publication number: 20080027153
    Abstract: Methods of making macroporous cation exchange resins are described. The macroporous cation exchange resins are in the form of particles such as beads that contain a hydrophilic, crosslinked, (meth)acrylic-type polymeric material. The macroporous cation exchange resins are prepared using an inverse suspension polymerization process in the presence of a water soluble, organic, aliphatic porogen having at least three hydroxy groups.
    Type: Application
    Filed: July 28, 2006
    Publication date: January 31, 2008
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • K-type polarizer and preparation thereof
    Patent number: 7087194
    Abstract: A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: August 8, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Jr., Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Process for preparing a K-type polarizer
    Patent number: 6998179
    Abstract: A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: February 14, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Todd D. Jones, Babu N. Gaddam, Robert T. Fitzsimons, Steven M. Heilmann, John J. Cael
  • K-type polarizer and preparation thereof
    Patent number: 6949207
    Abstract: A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: September 27, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Jr., Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Process for preparing a K-type polarizer
    Publication number: 20040241480
    Abstract: A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Application
    Filed: June 21, 2004
    Publication date: December 2, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Todd D. Jones, Babu N. Gaddam, Robert T. Fitzsimons, Steven M. Heilmann, John J. Cael
  • Process for preparing a K-type polarizer
    Patent number: 6808657
    Abstract: A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: October 26, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Todd D. Jones, Babu N. Gaddam, Robert T. Fitzsimons, Steven M. Heilmann, John J. Cael
  • K-type polarizer and preparation thereof
    Publication number: 20030189264
    Abstract: A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • K-type polarizer and preparation thereof
    Publication number: 20030190491
    Abstract: A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Todd D. Jones, Duane D. Fansler, Robert T. Fitzsimons, Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
  • Process for preparing a K-type polarizer
    Publication number: 20030157353
    Abstract: A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
    Type: Application
    Filed: February 12, 2002
    Publication date: August 21, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Duane D. Fansler, Todd D. Jones, Babu N. Gaddam, Robert T. Fitzsimons, Steven M. Heilmann, John J. Cael