Patents by Inventor Michael C. Yu

Michael C. Yu 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: 20200132925
    Abstract: A class of fibers is described that have a non-circular cross section on one or both ends that can by optimized to capture the optical radiation from a laser diode or diode array and deliver the light in the same or different shape on the opposite end of the fiber. A large multimode rectangular waveguide may be provided which can accept the radiation from a high-power diode bar and transform it into a circular cross section on the opposite end, while preserving brightness.
    Type: Application
    Filed: July 5, 2018
    Publication date: April 30, 2020
    Applicant: Lawrence Livermore National Security, LLC
    Inventors: Derrek R. Drachenberg, Graham S. Alien, Diana C. Chen, Matthew J. Cook, Robert P. Crist, Jay W. Dawson, Leily Kiani, Michael J. Messerly, Paul H. Pax, Nick Schenkel, Charles X. Yu, Victor V. Khitrov
  • Publication number: 20200015876
    Abstract: An ablation system comprises: an ablation catheter and a console. The ablation catheter comprises: a shaft including a proximal end, a distal portion and a distal end; an ablation element configured to deliver energy to tissue; and a force maintenance assembly comprising a force maintenance element and configured to control and/or assess contact force between the ablation element and cardiac tissue. The console is configured to operably attach to the ablation catheter and comprises: an energy delivery assembly configured to provide energy to the ablation element. Methods of ablating tissue are also provided.
    Type: Application
    Filed: October 11, 2017
    Publication date: January 16, 2020
    Inventors: Derrick Ren-Yu CHOU, Marcus Frederick JULIAN, Steven Anthony YON, Randell L. WERNETH, Alexander HIGGINS, Ricardo ROMAN, Alexander J. ASCONEGUY, Christoph SCHARF, Dennis O'BRIEN, Rob Andre PESCAR, Ahmed FALAHATPISHEH, Tom ESBECK, Gerald M. STOBBS III, Leo MARIAPPAN, Brandon Pratt Noheaikaika LEE, James Calvin ALLAN, Michael C. OLIVEIRA, Daniel WELSH, R. Maxwell FLAHERTY, J. Christopher FLAHERTY
  • Publication number: 20190329491
    Abstract: The method of making a three-dimensional article includes heating a composition comprising a polymer and hollow ceramic microspheres, extruding the composition in molten form from an extrusion head to provide at least a portion of a first layer of the three-dimensional article, and extruding at least a second layer of the composition in molten form from the extrusion head onto at least the portion of the first layer to make at least a portion of the three-dimensional article. Three-dimensional articles are also described. A composition including a polymer and hollow ceramic microspheres is also described. The composition may be a filament. The polymer is at least one of a low-surface-energy polymer or polyolefin. The composition can be useful, for example, in melt extrusion additive manufacturing, for example, fused filament fabrication.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 31, 2019
    Inventors: Phillip P. Yu, Stephen E. Amos, Mark J. Williams, Andrea C. Charif Rodriguez, Troy K. Ista, Joseph C. Dingeldein, Adam C. Schendel, Jeffrey N. Bartow, Michael C. Dadalas, Carsten Franke, Gabriele H. Gottschalk-Gaudig, Klaus Hintzer, Malte Korten, Gallus Schechner, Sebastian F. Zehentmaier, Fee Zentis
  • Patent number: 6472471
    Abstract: Various modified carbon products are disclosed which can form a part of a polymeric product containing the modified carbon product and a polymer. One type of modified carbon product disclosed is a carbon product having attached at least one organic group, monomeric group, or polymeric group. Another type of modified carbon product disclosed is a carbon product having attached a group having the formula: —Ar—CO2—R or —CnH2nCO2—R where R is an organic group, monomeric group, or a polymeric group.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: October 29, 2002
    Assignee: Cabot Corporation
    Inventors: Joel M. Cooke, Collin P. Galloway, Mark A. Bissell, Curtis E. Adams, Michael C. Yu, James A. Belmont, Robert M. Amici
  • Publication number: 20020061947
    Abstract: Various modified carbon products are disclosed which can form a part of a polymeric product containing the modified carbon product and a polymer. One type of modified carbon product disclosed is a carbon product having attached at least one organic group, monomeric group, or polymeric group. Another type of modified carbon product disclosed is a carbon product having attached a group having the formula: —Ar—CO2—R or —CnH2nCO2—R where R is an organic group, monomeric group, or a polymeric group.
    Type: Application
    Filed: December 14, 1998
    Publication date: May 23, 2002
    Inventors: JOEL M. COOKE, COLLIN P. GALLOWAY, MARK A. BISSELL, CURTIS E. ADAMS, MICHAEL C. YU, JAMES A. BELMONT, ROBERT M. AMICI
  • Patent number: 6110994
    Abstract: Various modified carbon products are disclosed which can form a part of a polymeric product containing the modified carbon product and a polymer. One type of modified carbon product disclosed is a carbon product having attached at least one organic group, monomeric group, or polymeric group. Another type of modified carbon product disclosed is a carbon product having attached a group having the formula: --Ar--CO.sub.2 --R or --(--C.sub.n H.sub.2n --)--CO.sub.2 --R, where R is an organic group, monomeric group, or a polymeric group.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: August 29, 2000
    Assignee: Cabot Corporation
    Inventors: Joel M. Cooke, Collin P. Galloway, Mark A. Bissell, Curtis E. Adams, Michael C. Yu, James A. Belmont, Robert M. Amici
  • Patent number: 5350834
    Abstract: Poly(arylene sulfide/sulfone) polymers are treated in order to increase melt stability and decrease impurities by contacting the poly(arylene sulfide/sulfone) polymer with a soluble zinc compound and an acidic solution. In one embodiment, the polymer is treated first with the soluble zinc compound, followed by treatment with the acidic solution. In another embodiment, the polymer is treated in one step with a solution comprising a water soluble zinc compound in an acidic solution.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: September 27, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Rex L. Bobsein, Michael C. Yu, Roy F. Wright, David A. Soules
  • Patent number: 5350806
    Abstract: A composition and method for forming the composition of poly(arylene sulfide) having improved impact strength and crack resistance. The invention involves mixing poly(arylene sulfide) with a polymeric rubber, a metal hydroxide, and a carboxylic anhydride, each in sufficient amounts and in proportions needed to improve impact strength and crack resistance.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: September 27, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, William H. Beever
  • Patent number: 5328980
    Abstract: A process for preparing arylene sulfide polymers is provided, comprising contacting an initiator compound, a halothiophenol compound, an polar organic compound, and a base. Blends comprising the inventive polymers and polyamides or polyaramides provide improved mechanical properties.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: July 12, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Owen H. Decker, Michael C. Yu
  • Patent number: 5321121
    Abstract: Poly(biphenylene sulfide/poly(phenylene sulfide) copolymers are produced by contacting a p-dihalobenzene and a bis-p-halobiphenyl under polymerization condiditons. Additionally a poly(biphenylene sulfide)/poly(phenylene sulfide) copolymer/fiber reinforced composite is provided.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: June 14, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, Jimmie J. Straw
  • Patent number: 5278261
    Abstract: Low temperature heat curable arylene sulfide copolymer compositions which are particularly suitable for use in coating applications are provided. The compositions basically comprise a first arylene sulfide copolymer having unsubstituted para- and ortho-aromatic sulfide repeating units in the polymer chain, and a second arylene sulfide copolymer having unsubstituted para-aromatic sulfide repeating units and alkyl-substituted aromatic sulfide repeating units in the polymer chain.
    Type: Grant
    Filed: December 8, 1992
    Date of Patent: January 11, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Roy F. Wright, Michael C. Yu
  • Patent number: 5266674
    Abstract: An arylene sulfide copolymer and a process for preparing same by contacting a mixture of two structurally different dihaloromatic compounds, at least one organic amide, at least one sulfur-containing compound, and water, and continuous long fiber reinforced plastics containing arylene sulfide copolymer as the polymer matrix or containing arylene sulfide copolymer in a thermoplastic resin matrix.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: November 30, 1993
    Assignee: Phillips Petroleum Company
    Inventor: Michael C. Yu
  • Patent number: 5235034
    Abstract: Poly(arylene sulfide/sulfone) polymers are treated in order to increase melt stability and decrease impurities by contacting the poly(arylene sulfide/sulfone) polymer with a soluble zinc compound and an acidic solution. In one embodiment, the polymer is treated first with the soluble zinc compound, followed by treatment with the acidic solution. In another embodiment, the polymer is treated in one step with a solution comprising a water soluble zinc compound in an acidic solution.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: August 10, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Rex L. Bobsein, Michael C. Yu, Roy F. Wright, David A. Soules
  • Patent number: 5219983
    Abstract: Poly(biphenylene sulfide/poly(phenylene sulfide) copolymers are produced by contacting a p-dihalobenzene and a bis-p-halobiphenyl under polymerization conditions. Additionally a poly(biphenylene sulfide)/poly(phenylene sulfide) copolymer/fiber reinforced composite is provided.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: June 15, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, Jimmie J. Straw
  • Patent number: 5194506
    Abstract: Polyethylene terephthalate molding compositions are provided which comprise polyethylene terephthalate, an aliphatic polyester, a warp resisting amount of an arylene sulfide copolymer, filler, and optionally, colorants.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: March 16, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Howard F. Efner, Michael C. Yu, Ray D. Ramsay
  • Patent number: 5189121
    Abstract: Low temperature heat curable arylene sulfide copolymer compositions which are particularly suitable for use in coating applications are provided. The compositions basically comprise a first arylene sulfide copolymer having unsubstituted para- and ortho-aromatic sulfide repeating units in the polymer chain, and a second arylene sulfide copolymer having unsubstituted para-aromatic sulfide repeating units and alkyl-substituted aromatic sulfide repeating units in the polymer chain.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 23, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Roy F. Wright, Michael C. Yu
  • Patent number: 5087666
    Abstract: There are provided compositions comprising poly(arylene sulfide), polymeric rubber, polyethylene, and carboxylic anhydride; and methods for making these compositions. Articles produced from the compositions have reduced shrinkage and improved impact strength.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: February 11, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, John B. Allison
  • Patent number: 5075420
    Abstract: A phenylene sulfide/sulfone polymer with relatively good melt stability and a method of producing such a polymer are provided. A previously produced phenylene sulfide/sulfone polymer is redissolved in N-methyl-2-pyrrolidone to form a solution. This solution is combined with an alcohol to precipitate highly melt stable phenylene sulfide/sulfone polymer in a particulate form. The alcohol has one to four carbon atoms, such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and the like and mixtures thereof.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: December 24, 1991
    Assignee: Phillips Petroleum Company
    Inventors: Rex L. Bobsein, Robert W. Campbell, Harold D. Yelton, Michael C. Yu
  • Patent number: 5039788
    Abstract: A phenylene sulfide/sulfone polymer with relatively good melt stability and a method of producing such a polymer are provided. A previously produced phenylene sulfide/sulfone polymer is redissolved in N-methyl-2-pyrrolidone to form a solution. This solution is combined with an alcohol to precipitate highly melt stable phenylene sulfide/sulfone polymer in a particulate form. The alcohol has one to four carbon atoms, such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and the like and mixtures thereof.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: August 13, 1991
    Assignee: Phillips Petroleum Company
    Inventors: Rex L. Bobsein, Robert W. Campbell, Harold D. Yelton, Michael C. Yu
  • Patent number: 5037951
    Abstract: An improved process for producing biphenylene sulfide comprising reacting difluorobiphenyl with an alkali metal sulfide in a polar organic compound. The resulting polymer has a high melting point and fiber composites formed therefrom have excellent mechanical properties.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: August 6, 1991
    Assignee: Phillips Petroleum Company
    Inventors: Michael C. Yu, Harold D. Yelton