Patents by Inventor Kannan Seshadri

Kannan Seshadri 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).

  • Publication number: 20100116739
    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: January 20, 2010
    Publication date: May 13, 2010
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, JR., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • Publication number: 20100116748
    Abstract: Methods of making macroporous anion exchange resins are described. The macroporous anion exchange resins are in the form of particles such as beads that contain a hydrophilic, crosslinked, (meth)acrylic-type polymeric material. Additionally, methods of purifying a negatively charged material using the macroporous anion exchange resins, methods of making chromatographic columns that contain the macroporous anion exchange resins, methods of making filter elements that contain the macroporous anion exchange resins, and methods of making porous composite materials that contain the macroporous anion exchange resins are described.
    Type: Application
    Filed: January 18, 2010
    Publication date: May 13, 2010
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, JR., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • Publication number: 20100112664
    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. Additionally, methods of purifying a positively charged material using the macroporous cation exchange resins, methods of making chromatographic columns that contain the macroporous cation exchange resins, methods of making filter elements that contain the macroporous cation exchange resins, and methods of making porous composite materials that contain the macroporous cation exchange resins are described.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 6, 2010
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, JR., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • Publication number: 20100075131
    Abstract: Polyethyleneimine and polyalkylene biguanide ligand functionalized substrates, methods of making ligand functionalized substrates, and methods of using functionalized substrates are disclosed.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 25, 2010
    Inventors: Mark R. Etzel, Kannan Seshadri, Jerald K. Rasmussen, Clinton P. Waller, JR., Douglas E. Weiss, Yi He
  • Publication number: 20100075560
    Abstract: Polyethyleneimine and polyalkylene biguanide ligand functionalized substrates, methods of making ligand functionalized substrates, and methods of using functionalized substrates are disclosed.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 25, 2010
    Inventors: Kannan Seshadri, Jerald K. Rasmussen, Clinton P. Waller, JR., Douglas E. Weiss, Yi He
  • Patent number: 7683100
    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. Additionally, methods of purifying a positively charged material using the macroporous cation exchange resins, methods of making chromatographic columns that contain the macroporous cation exchange resins, methods of making filter elements that contain the macroporous cation exchange resins, and methods of making porous composite materials that contain the macroporous cation exchange resins are described.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: March 23, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, Jr., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • Patent number: 7674836
    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: Grant
    Filed: July 28, 2006
    Date of Patent: March 9, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, Jr., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • Patent number: 7674835
    Abstract: Methods of making macroporous anion exchange resins are described. The macroporous anion exchange resins are in the form of particles such as beads that contain a hydrophilic, crosslinked, (meth)acrylic-type polymeric material. Additionally, methods of purifying a negatively charged material using the macroporous anion exchange resins, methods of making chromatographic columns that contain the macroporous anion exchange resins, methods of making filter elements that contain the macroporous anion exchange resins, and methods of making porous composite materials that contain the macroporous anion exchange resins are described.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: March 9, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Jerald K. Rasmussen, Robert T. Fitzsimons, Jr., Kannan Seshadri, Simon K. Shannon, Peter D. Wickert, James I. Hembre
  • 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
  • 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
  • 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.
  • 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
  • Publication number: 20070142590
    Abstract: Methods of making macroporous anion exchange resins are described. The macroporous anion exchange resins are in the form of particles such as beads that contain a hydrophilic, crosslinked, (meth)acrylic-type polymeric material. Additionally, methods of purifying a negatively charged material using the macroporous anion exchange resins, methods of making chromatographic columns that contain the macroporous anion exchange resins, methods of making filter elements that contain the macroporous anion exchange resins, and methods of making porous composite materials that contain the macroporous anion exchange resins are described.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 21, 2007
    Inventors: Jerald Rasmussen, Robert Fitzsimons, Kannan Seshadri, Simon Shannon, Peter Wickert, James Hembre
  • Publication number: 20070142586
    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. Additionally, methods of purifying a positively charged material using the macroporous cation exchange resins, methods of making chromatographic columns that contain the macroporous cation exchange resins, methods of making filter elements that contain the macroporous cation exchange resins, and methods of making porous composite materials that contain the macroporous cation exchange resins are described.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 21, 2007
    Inventors: Jerald Rasmussen, Robert Fitzsimons, Kannan Seshadri, Simon Shannon, Peter Wickert, James Hembre
  • Publication number: 20070114229
    Abstract: Devices, systems, and methods for processing sample materials. The sample materials may be located in a plurality of process chambers in the device, which is rotated during heating of the sample materials.
    Type: Application
    Filed: January 12, 2007
    Publication date: May 24, 2007
    Inventors: William Bedingham, Raj Rajagopal, Barry Robole, Kannan Seshadri
  • Publication number: 20070075022
    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: September 30, 2005
    Publication date: April 5, 2007
    Inventors: Kelly Gibbens, Masayuki Nakamura, Kannan Seshadri, Andrew Rabins, Larry Carson, Robert Fitzsimons
  • Publication number: 20060070955
    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: Application
    Filed: September 30, 2005
    Publication date: April 6, 2006
    Inventors: Andrew Rabins, Kelly Gibbens, Masayuki Nakamura, Kannan Seshadri, Robert Fitzsimons, Larry Carson, Stephen Larsen
  • Publication number: 20060070950
    Abstract: A composite filter medium comprising a filter element comprising at least one porous fibrous filtration layer, and at least one layer of a sorbent, stationary phase particulates selected from organic or inorganic particulates having an average diameter of less than 50 micrometers, soft particulates, and ground monolithic particulates. The particulates are capable of binding target molecule by, for example, adsorption, ion exchange, hydrophobic binding, and affinity binding. The particulates provide higher binding capacities than can be achieved using filter media incorporating conventional process scale chromatography resin particulates.
    Type: Application
    Filed: September 29, 2005
    Publication date: April 6, 2006
    Inventors: Jerald Rasmussen, Andrew Rabins, James Hembre, Kannan Seshadri, Kelly Gibbens, Masayuki Nakamura, Robert Fitzsimons, Simon Shannon, Stephen Roscoe, Larry Carson
  • Patent number: 6987253
    Abstract: Devices, systems, and methods for processing sample materials. The sample materials may be located in a plurality of process chambers in the device, which is rotated during heating of the sample materials.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: January 17, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: William Bedingham, Raj Rajagopal, Barry W. Robole, Kannan Seshadri
  • Publication number: 20050242091
    Abstract: Devices, systems, and methods for processing sample materials. The sample materials may be located in a plurality of process chambers in the device, which is rotated during heating of the sample materials.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 3, 2005
    Inventors: William Bedingham, Raj Rajagopal, Barry Robole, Kannan Seshadri