Patents by Inventor Charles A. Angell

Charles A. Angell 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).

  • Patent number: 7504473
    Abstract: Novel chain polymers comprising weakly basic anionic moieties chemically bound into a polyether backbone at controllable anionic separations are presented. Preferred polymers comprise orthoborate anions capped with dibasic acid residues, preferably oxalato or malonato acid residues. The conductivity of these polymers is found to be high relative to that of most conventional salt-in-polymer electrolytes. The conductivity at high temperatures and wide electrochemical window make these materials especially suitable as electrolytes for rechargeable lithium batteries.
    Type: Grant
    Filed: June 16, 2001
    Date of Patent: March 17, 2009
    Assignee: Arizona Board of Regents for and on behalf of Arizona State University
    Inventors: Charles A. Angell, Wu Xu
  • Patent number: 7012124
    Abstract: Novel conductive polyanionic polymers and methods for their preparion are provided. The polyanionic polymers comprise repeating units of weakly-coordinating anionic groups chemically linked to polymer chains. The polymer chains in turn comprise repeating spacer groups. Spacer groups can be chosen to be of length and structure to impart desired electrochemical and physical properties to the polymers. Preferred embodiments are prepared from precursor polymers comprising the Lewis acid borate tri-coordinated to a selected ligand and repeating spacer groups to form repeating polymer chain units. These precursor polymers are reacted with a chosen Lewis base to form a polyanionic polymer comprising weakly coordinating anionic groups spaced at chosen intervals along the polymer chain. The polyanionic polymers exhibit high conductivity and physical properties which make them suitable as solid polymeric electrolytes in lithium batteries, especially secondary lithium batteries.
    Type: Grant
    Filed: June 16, 2001
    Date of Patent: March 14, 2006
    Assignee: Arizona Board of Regents, acting for and on behalf of Arizona State University
    Inventors: Charles A. Angell, Wu Xu, Xiaoguang Sun
  • Publication number: 20040053137
    Abstract: Novel conductive polyanionic polymers and methods for their preparion are provided. The polyanionic polymers comprise repeating units of weakly-coordinating anionic groups chemically linked to polymer chains. The polymer chains in turn comprise repeating spacer groups. Spacer groups can be chosen to be of length and structure to impart desired electrochemical and physical properties to the polymers. Preferred embodiments are prepared from precursor polymers comprising the Lewis acid borate tri-coordinated to a selected ligand and repeating spacer groups to form repeating polymer chain units. These precursor polymers are reacted with a chosen Lewis base to form a polyanionic polymer comprising weakly coordinating anionic groups spaced at chosen intervals along the polymer chain. The polyanionic polymers exhibit high conductivity and physical properties which make them suitable as solid polymeric electrolytes in lithium batteries, especially secondary lithium batteries.
    Type: Application
    Filed: September 19, 2003
    Publication date: March 18, 2004
    Inventors: Charles A. Angell, Wu Xu, Xiaoguang Sun
  • Publication number: 20040054126
    Abstract: Novel chain polymers comprising weakly basic anionic moieties chemically bound into a polyether backbone at controllable anionic separations are presented. Preferred polymers comprise orthoborate anions capped with dibasic acid residues, preferably oxalato or malonato acid residues. The conductivity of these polymers is found to be high relative to that of most conventional salt-in-polymer electrolytes. The conductivity at high temperatures and wide electrochemical window make these materials especially suitable as electrolytes for rechargeable lithium batteries.
    Type: Application
    Filed: September 3, 2003
    Publication date: March 18, 2004
    Inventors: Charles A. Angell, Wu Xu
  • Publication number: 20040034253
    Abstract: Orthoborate salts suitable for use as electrolytes in lithium batteries and methods for making the electrolyte salts are provided. The electrolytic salts have one of the formulae (I). In this formula anionic orthoborate groups are capped with two bidentate chelating groups, Y1 and Y2. Certain preferred chelating groups are dibasic acid residues, most preferably oxalyl, malonyl and succinyl, disulfonic acid residues, sulfoacetic acid residues and halo-substituted alkylenes. The salts are soluble in non-aqueous solvents and polymeric gels and are useful components of lithium batteries in electrochemical devices.
    Type: Application
    Filed: September 3, 2003
    Publication date: February 19, 2004
    Inventors: Charles A. Angell, Wu Xu
  • Patent number: 6155057
    Abstract: Methods of controlling crystallization of aqueous lithium halide refrigerant fluids utilizing an organic counter cation-containing salt material effective to depress the crystallization temperature of the refrigerant fluid and corresponding refrigerant fluids.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: December 5, 2000
    Assignee: Arizona Board of Regents
    Inventors: Charles A. Angell, Vesselin Velikov, Hemalata Senapati
  • Patent number: D522566
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: June 6, 2006
    Assignee: DataCard Corporation
    Inventors: Eric C. Stender, Faith J. Rekowski, Arthur J. Paulson, Michael A. Morrison, Charles A. Angell, Brian Clemens
  • Patent number: D485473
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: January 20, 2004
    Assignee: S. C. Johnson Home Storage, Inc.
    Inventors: Brian C. Dais, Joseph Perushek, Donald E. McCumber, Charles A. Angell
  • Patent number: D486358
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: February 10, 2004
    Assignee: S. C. Johnson Home Storage, Inc.
    Inventors: Brian C. Dais, Joseph Perushek, Donald E. McCumber, Charles A. Angell