Patents by Inventor Toby Chapman

Toby Chapman 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: 7628888
    Abstract: A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: December 8, 2009
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Eric J. Beckman, W. Eamon Carroll, Toby Chapman, Kristen E. Minnich, Dennis Sagl, Richard J. Goddard
  • Publication number: 20070004890
    Abstract: A method of synthesizing a compound having the formula: comprising the step of: reacting a N-vinylformamide salt having the formula with a compound having the formula XRR1; wherein X is Br, Cl or I, M is an alkali metal or an alkali earth metal, R1 is a C0-C25 alkylene group, a C0-C25 fluroalkylene group or a C0-C25 perfluoro alkylene group, R2 is H, provided R1 is not absent, an alkyl group, a fluroalkyl group, a perfluoroalkyl group, an aryl group, a hydroxy group, a polyether group, a heterocyclic group of 5 or 6 atoms wherein at least one of the atoms is not a carbon and is N, O, or S, —OR3, wherein, R3 is an alkyl group, a fluoroalkyl group, a perfluoroalkyl group, or an aryl group, —C(O)R4, —C(O)OR4, —OC(O)R4, wherein R4 is an H, an alkyl group, a fluoroalkyl group, a perfluoroalkyl group, or an aryl group, a phthalimide group or NR5R5 wherein R5 and R5 are independently H, —C(O)R4, an alkyl, a fluoroalkyl group, a perfluoroalkyl group or an aryl group.
    Type: Application
    Filed: September 12, 2006
    Publication date: January 4, 2007
    Inventors: Eric Beckman, Toby Chapman, Lianjun Shi
  • Publication number: 20060231228
    Abstract: A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
    Type: Application
    Filed: June 12, 2006
    Publication date: October 19, 2006
    Inventors: Eric Beckman, W. Carroll, Toby Chapman, Kristen Minnich, Dennis Sagl, Richard Goddard
  • Patent number: 7090745
    Abstract: A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: August 15, 2006
    Assignee: University of Pittsburgh
    Inventors: Eric J. Beckman, W. Eamon Carroll, Toby Chapman, Kristen E. Minnich, Dennis Sagl, Richard J. Goddard
  • Publication number: 20050033089
    Abstract: A process to produce N-vinylformamide includes the steps of: reacting hydroxyethyl formamide with a reactant comprising at least one cyclic anhydride group to form an ester, and dissociating the ester via heat in a thin film evaporation to synthesize N-vinylformamide and a compound comprising at least one diacid group, the N-vinylformamide separating from the diacid during the thin film evaporation. The reactant including at least one cyclic anhydride group can, for example, be succinic anhydride, maleic anhydride, phthalic anhydride, (2-docecen-1-yl)succinic anhydride, exo-3,6-epoxy-1,2,3,6 -tetrahydrophthalic anhydride or a polymer including at least one cyclic anhydride group.
    Type: Application
    Filed: February 27, 2004
    Publication date: February 10, 2005
    Inventors: Eric Beckman, Toby Chapman, Cedrick Favero, Christopher Capelli, Harold Swift, William Carroll
  • Publication number: 20040050513
    Abstract: A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
    Type: Application
    Filed: September 23, 2002
    Publication date: March 18, 2004
    Inventors: Eric J. Beckman, W. Eamon Carroll, Toby Chapman, Kristen E. Minnich, Dennis Sagl, Richard J. Goddard