Patents by Inventor Peter G. P. Ang

Peter G. P. Ang 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: 5064636
    Abstract: A paramagnetic oil emulsion for enteric administration composed of about 5 to about 30 volume percent oil and about 70 to about 95 volume percent aqueous-based paramagnetic carrier, the aqueous-based paramagnetic carrier having a magnetic resonance contrast effective and less than a toxic amount of at least one water-soluble paramagnetic agent. The paramagetic oil emulsion provides high intensity magnetic resonance signals in the gastro-intestional tract for MRI evaluation of the abdomen and pelvis.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: November 12, 1991
    Inventors: King C. P. Li, Peter G. P. Ang
  • Patent number: 4673473
    Abstract: Apparatus for reducing carbon dioxide to the product includes a reduction cell which has a dual porosity cathode, a catholyte chamber having an inlet, a passageway through which passes an electrolyte, a dual porosity cathode separating the passageway from the catholyte chamber, an anolyte chamber has an inlet and an outlet. A porous anode with a hydrophobic barrier separates the passageway from the anolyte chamber. A source provides a d.c. voltage across the cathode and the anode. Water is provided to the inlet of the anolyte chamber, while an electrolyte is provided to the passageway. Carbon dioxide is provided to the inlet of the catholyte chamber so that the carbon dioxide is electrochemically reduced within the dual porosity cathode with the electrolyte and hydrogen ions so as to cause the reduction of the carbon dioxide to a product and to cause oxygen to be emitted from the outlet of the anode chamber. The product is removed from the electrolyte after leaving the electrolytic cell.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: June 16, 1987
    Assignee: Peter G. PA Ang
    Inventors: Peter G. P. Ang, Anthony F. Sammells
  • Patent number: 4620906
    Abstract: A process and apparatus for reducing carbon dioxide to formic acid includes two redox couple electrolyte solutions separated by a first membrane having photosensitizers. The carbon dioxide to be reduced is provided to a second membrane which is contiguous to one of the redox couple electrolyte solutions. The second membrane has photosensitizers, a catalyst and high hydrogen overpotential material. Water provides hydrogen ions, which participate in the reduction of the carbon dioxide, via a separator. In operation both membranes are illuminated and produce excited photosensitizers which cause electron transfer from a first redox solution to a second redox solution and then to the carbon dioxide in the second membrane thereby, in cooperation with the hydrogen ions, reducing at least some of the carbon dioxide at a surface of the second membrane to provide formic acid.
    Type: Grant
    Filed: January 31, 1985
    Date of Patent: November 4, 1986
    Assignee: Texaco Inc.
    Inventor: Peter G. P. Ang
  • Patent number: 4608133
    Abstract: Apparatus and method for the electrochemical reduction of carbon dioxide to a product includes a housing divided into two sections by a membrane. An electrolyte solution including a non-aqueous electrolyte and a supporting electrolyte is provided to the two sections of the housing. A cathode is located in one section of the housing while an anode is located in the other section. Carbon dioxide is provided to the section having the cathode. A direct current voltage is provided to the cathode and to the anode to cooperate in a reaction between the carbon dioxide and the electrolyte solution to provide a product.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: August 26, 1986
    Assignee: Texaco Inc.
    Inventors: Abraham Morduchowitz, Peter G. P. Ang
  • Patent number: 4595465
    Abstract: A process and apparatus for converting metallic elements to metallic oxalates in the presence of carbon dioxide includes two redox couple electrolyte solutions separated by a first membrane having photosensitizers. The carbon dioxide to be reduced is provided to a second membrane which is contiguous to one of the redox couple electrolyte solutions. The second membrane has photosensitizers and a catalyst. A non-aqueous electrolyte slurry, which includes a metal element, solvent and salt, is provided in a manner so that some of the slurry is in contact with the second membrane. Both membranes are illuminated and electrical voltage is provided across the electrolyte solutions and the electrolyte slurry in a manner so that there is one electrode in another electrolyte solution and another electrode in the electrolyte slurry so as to cause a reaction between the carbon dioxide at the second membrane and the electrolyte slurry to produce the metallic oxalate.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: June 17, 1986
    Assignee: Texaco Inc.
    Inventors: Peter G. P. Ang, Anthony F. Sammells, Abraham Morduchowitz
  • Patent number: 4523981
    Abstract: A process for reducing carbon dioxide to at least one useful product includes two redox couple electrolyte solutions separated by a first membrane having photosensitizers. The carbon dioxide to be reduced is separated from one of the redox couple electrolyte solutions by another membrane having a catalyst. Water provides hydrogen ions which participate in the reduction of carbon dioxide via a separator. In the operation both membranes are illuminated and produce excited solar sensitizers which cause electron transfer from a first redox solution to the second redox solution and then to the carbon dioxide to react with the hydrogen ions, reducing the carbon dioxide to provide at least one product.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: June 18, 1985
    Assignee: Texaco Inc.
    Inventors: Peter G. P. Ang, Anthony F. Sammells
  • Patent number: 4485154
    Abstract: An electrically rechargeable anionically active reduction-oxidation electric storage-supply system and process is disclosed using a sodium or potassium sulfide-polysulfide anolyte reaction and an iodide-polyiodide, chloride-chlorine or bromide-bromine species catholyte reaction. The catholyte and anolyte are separated by an ion selective membrane permeable to positive sodium and potassium ions and substantially impermeable to negative bromide, chloride, iodide, sulfide and polysulfide ions. A flowing electrolyte system is disclosed with external electrolyte storage vessels. The apparatus and process provide an electrically rechargeable anionically active reduction-oxidation system in which the electrolytes may be maintained at near neutral or slightly basic pH, with virtually no parasitic side reactions upon charging, such as hydrogen or oxygen evolution, and the disclosed storage and supply system provides higher energy densities than referenced prior art systems.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: November 27, 1984
    Assignee: Institute of Gas Technology
    Inventors: Robert J. Remick, Peter G. P. Ang
  • Patent number: 4240882
    Abstract: A gas diffusion semiconductor electrode and solar cell and a process for gaseous fixation, such as nitrogen photoreduction, CO.sub.2 photoreduction and fuel gas photo-oxidation. The gas diffusion photosensitive electrode has a central electrolyte-porous matrix with an activated semiconductor material on one side adapted to be in contact with an electrolyte and a hydrophobic gas diffusion region on the opposite side adapted to be in contact with a supply of molecular gas.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: December 23, 1980
    Assignee: Institute of Gas Technology
    Inventors: Peter G. P. Ang, Anthony F. Sammells
  • Patent number: 4235955
    Abstract: A solid state photoelectrochemical cell providing in-situ electrochemical energy storage having a homogeneous solid electrolyte matrix and associated ionic conductors with a central electrolyte separator portion providing ionic conductance and an oxidant portion on one side and a reductant portion on the other side each having redox couples in fixed lattice positions and possessing ionic and electronic conductivity. At least one photosensitive photoelectrode is in ionic communication with the oxidant and/or reductant portion(s) whereby electrons or electron holes are transmitted to that portion while the photoelectrode is illuminated causing oxidation or reduction of the redox couple. The apparatus and process provide conversion of solar to electrical energy using a solid state photoelectrochemical cell.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: November 25, 1980
    Assignee: Institute of Gas Technology
    Inventors: Anthony F. Sammells, Peter G. P. Ang
  • Patent number: 4215182
    Abstract: Apparatus and processes for conversion of solar energy to chemical and electrical energy using a photoelectrochemical membrane cell to regenerate the redox anolyte of a redox-oxygen cell.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: July 29, 1980
    Assignee: Institute of Gas Technology
    Inventors: Peter G. P. Ang, Anthony F. Sammells