Patents by Inventor Travis J. Williams

Travis J. Williams 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: 11926710
    Abstract: A method of aerobic depolymerization of fiber-reinforced polymer (FRP) composites using sustainable reagents and conditions. A cured matrix is digested into soluble monomers and oligomers by catalytic aerobic oxidation. Carbon fibers are removed for re-use, then the remaining material is treated and valuable monomers are isolated. The isolated monomers can be converted back into resin precursors for re-use. The method solves the problem created because the typically irreversible cure reaction impedes recycling and re-use of FRP composites.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 12, 2024
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Steven Nutt, Yijia Ma, Carlos Navarro
  • Patent number: 10654785
    Abstract: Conversion of vegetable-derived triglycerides to fatty acid methyl esters (FAMEs) is a popular approach to the generation of biodiesel fuels and the basis of a growing industry. Drawbacks of the strategy are that (a) the glycerol backbone of the triglyceride is discarded as waste in this synthesis, and (2) many natural triglycerides are multiply-unsaturated or fully saturated, giving inferior performance and causing engine problems with long-term use. Here, we show that catalysis by iridium complex 1 can address both of these problems through selective reduction of triglycerides high in polyunsaturated fatty esters to FAMEs with high oleate concentration. This is realized using hydrogen imbedded in the triglyceride backbone, concurrently generating lactate as a value-added C3 product. Additional methanol or glycerol as a hydrogen source enables reduction of corn and soybean oils to >80% oleate.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: May 19, 2020
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Zhiyao Lu, Valery Cherepakhin
  • Patent number: 10654879
    Abstract: A compound having formula I that is useful for C?O reduction is provided: wherein: M is a transition metal; X1, X2 are each independently a counterion; and R1, R2, R3 are each independently H, C1-6 alkyl, C6-15 aryl, or C6-15 heteroaryl.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: May 19, 2020
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Sri Narayan, Travis J. Williams, Zhiyao Lu, Debanjan Mitra
  • Patent number: 10556921
    Abstract: A formic acid decomposition catalyst system includes organometallic complexes having formula 1: wherein: M is a transition metal; E is P, N, or C (as in imidazolium carbene); R1, R2 are independently C1-6 alkyl groups; o is 1, 2, 3, or 4; R3 are independently hydrogen, C1-6 alkyl groups, OR14, NO2, halogen; R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R15, R16 are independently hydrogen or C1-6 alkyl groups; R14 is a C1-6 alkyl group; and X? is a negatively charge counter ion.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: February 11, 2020
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Jeff Joseph A. Celaje, Zhiyao Lu
  • Patent number: 10202327
    Abstract: A catalyst system includes a complex having formula I which advantageously has a sterically protecting N-heterocyclic carbene (NHC) carbene-pyridine ligand to handle harsh reactions conditions than many prior art catalysts: wherein M is a transition metal; o is 0, 1, 2, 3, or 4; R1 is a C1-6 alkyl, a C6-18 aryl, or an optionally substituted C5-18 heteroaryl. In a refinement, R1 is methyl, ethyl, butyl, n-propyl, isopropyl, n-butyl, sec-butyl, or t-butyl; R2, R3, R3? are independently an optionally substituted C1-6 alkyl, halo (e.g., Cl, F, Br, etc), NO2, an optionally substituted C6-18 aryl, or an optionally substituted C5-18 heteroaryl; R4, R4? are independently an optionally substituted C1-6 alkyl, halo, NO2, an optionally substituted C6-18 aryl, or an optionally substituted C5-18 heteroaryl; and X? is a negatively charge counter ion and L1, L2 are each independently a neutral ligand.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: February 12, 2019
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Travis J. Williams, Zhiyao Lu, Ivan Demianets
  • Patent number: 10179798
    Abstract: A formic acid decomposition catalyst system includes organometallic complexes having formula 1: wherein: M is a transition metal; E is P, N, or C (as in imidazolium carbene); R1, R2 are independently C1-6 alkyl groups; o is 1, 2, 3, or 4; R3 are independently hydrogen, C1-6 alkyl groups, OR14, NO2, halogen; R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R15, R16 are independently hydrogen or C1-6 alkyl groups; R14 is a C1-6 alkyl group; and X? is a negatively charge counter ion.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: January 15, 2019
    Assignee: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Travis J. Williams, Jeff Joseph A. Celaje, Zhiyao Lu
  • Patent number: 10052621
    Abstract: A formic acid decomposition catalyst system includes metal-ligand complexes having formula 1: wherein M is a transition metal; R1, R2 are independently C1-6 alkyl groups; o is 1, 2, 3, or 4; R3 are independently hydrogen, C1-6 alkyl groups, OR14, NO2, or halogen; R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, are independently hydrogen or C1-6 alkyl groups; R14 is a C1-6 alkyl group; and X? is a negatively charge counter ion.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: August 21, 2018
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Jeff Joseph A. Celaje, Zhiyao Lu
  • Patent number: 9403753
    Abstract: A ruthenium bis(pyrazolyl)borate scaffold that enables cooperative reduction reactivity in which boron and ruthenium centers work in concert to effect selective nitrile reduction is provided. The pre-catalyst compound [?3-(1-pz)2HB(N?CHCH3)]Ru(cymene)+ TfO? (pz=pyrazolyl) was synthesized using readily-available materials through a straightforward route, thus making it an appealing catalyst for a number of reactions.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: August 2, 2016
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Zhiyao Lu
  • Patent number: 9273184
    Abstract: A method for forming a fluorinated compound includes a step of forming a sulfonate ester of a polyethylene glycol. The sulfonate ester is then reacted with a fluorinated diol in the presence of a base such that the polyethylene glycol is attached to one of the hydroxyl groups in the fluorinated diol. The other hydroxyl group in the fluorinated diol is reacted is converted into a leaving group and reacted with an number of nucleophiles. Complexes of the fluorinated compounds that as useful in Magnetic Resonance Imaging are also provided.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: March 1, 2016
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Emine Boz
  • Patent number: 9079768
    Abstract: Ligand-metal bifunctional ruthenium complexes are efficient catalysts for the liberation of two or more molar equivalents of hydrogen from ammonia-borane, a prospective hydrogen storage medium. In some cases, the mechanism for the dehydrogenation features a ruthenium hydride resting state from which dihydrogen loss is the rate-determining step.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: July 14, 2015
    Assignee: University of Southern California
    Inventors: Travis J. Williams, Brian L. Conley
  • Publication number: 20130012719
    Abstract: Azolines are oxidized in the presence of a copper-containing catalyst to azoles in the presence of molecular oxygen. A synthetic scheme converting azolines azoles is also provided.
    Type: Application
    Filed: July 6, 2012
    Publication date: January 10, 2013
    Applicant: University of Southern California
    Inventors: Travis J. Williams, Anna C. Dawsey, Vincent Li, Kimberly C. Hamilton, Jianmei Wang
  • Publication number: 20120277573
    Abstract: The invention provides nanoparticles for delivery of imaging agents, drugs, and other molecules, such as genetic material. The nanoparticles have a core structure comprising the imaging agent and/or drug, and a shell structure that allows for water solubility. The shell structure further provides a barrier with limited water permeability that protects the core. The nanoparticles can be induced to release their cargo by treatment with ultrasound. Methods of delivering drugs and imaging agents are also provided, whereby the nanoparticles are delivered to tissues of interest in a substantially inert form, then activated using ultra-sound to release the drugs or imaging agents.
    Type: Application
    Filed: December 24, 2010
    Publication date: November 1, 2012
    Inventors: Andy Y. Chang, Travis J. Williams, Emine Boz
  • Publication number: 20120201744
    Abstract: Ligand-metal bifunctional ruthenium complexes are efficient catalysts for the liberation of two or more molar equivalents of hydrogen from ammonia-borane, a prospective hydrogen storage medium. In some cases, the mechanism for the dehydrogenation features a ruthenium hydride resting state from which dihydrogen loss is the rate-determining step.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 9, 2012
    Applicant: UNIVERSITY OF SOUTHERN CALIFORNIA
    Inventors: Travis J. Williams, Brian L. Conley