Patents by Inventor Shenggao Liu

Shenggao Liu 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: 8420768
    Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: April 16, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
  • Patent number: 8013078
    Abstract: This invention is related to heteroatom containing diamondoids (i.e., “heterodiamondoids”) which are compounds having a diamondoid nucleus in which one or more of the diamondoid nucleus carbons has been substitutionally replaced with a noncarbon atom. These heteroatom substituents impart desirable properties to the diamondoid. In addition, the heterodiamondoids are functionalized affording compounds carrying one or more functional groups covalently pendant therefrom. This invention is further related to polymerizable functionalized heterodiamondoids. In a preferred aspect of this invention the diamondoid nuclei are triamantane and higher diamondoid nuclei. In another preferred aspect, the heteroatoms are selected to give rise to diamondoid materials which can serve as n- and p-type materials in electronic devices can serve as optically active materials.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: September 6, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Patent number: 7981975
    Abstract: This invention is related to heteroatom containing diamondoids (i.e., “heterodiamondoids”) which are compounds having a diamondoid nucleus in which one or more of the diamondoid nucleus carbons has been substitutionally replaced with a noncarbon atom. These heteroatom substituents impart desirable properties to the diamondoid. In addition, the heterodiamondoids are functionalized affording compounds carrying one or more functional groups covalently pendant therefrom. This invention is further related to polymerizable functionalized heterodiamondoids. In a preferred aspect of this invention the diamondoid nuclei are triamantane and higher diamondoid nuclei. In another preferred aspect, the heteroatoms are selected to give rise to diamondoid materials which can serve as n- and p-type materials in electronic devices can serve as optically active materials.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: July 19, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Publication number: 20110112258
    Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.
    Type: Application
    Filed: December 20, 2010
    Publication date: May 12, 2011
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
  • Patent number: 7884256
    Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: February 8, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Patent number: 7795468
    Abstract: This invention is directed to functionalized higher diamondoids having at least one functional group. Preferably these derivatives have the following Formula I: wherein D is a higher diamondoid nucleus and wherein R1, R2, R3, R4, R5 and R6 are independently selected from a group consisting of hydrogen and functional groups, provided that there is at least one functional group on the derivative. The functionalized higher diamondoid compounds may also be of the formula D—L—(D)n wherein D is a higher diamondoid nucleus and L is a linking group and n is 1 or more. The functionalized higher diamondoid compounds additionally may be of the formula R38—D—D—R39 wherein D is a higher diamondoid nucleus and R38 and R39 are substituents.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: September 14, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl, Waqar R. Qureshi
  • Publication number: 20100221453
    Abstract: Diamonds are used to nucleate diamond and diamond-like carbon films in a chemical vapor deposition process using bias enhancement. A negative bias is applied to the substrate, such that a cationic form of the diamond is accelerated toward the substrate during the nucleation phase of the deposition. In this manner, the diamondoid may be embedded or partially embedded in the substrate and/or growing film, increasing the adhesion of the film to the substrate. According to the present embodiments, it is not necessary to mechanically pre-seed the substrate for nucleation purposes.
    Type: Application
    Filed: May 20, 2010
    Publication date: September 2, 2010
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu, Waqar R. Queshi, Wasiq Bokhari
  • Publication number: 20100190985
    Abstract: This invention is related to heteroatom containing diamondoids (i.e., “heterodiamondoids”) which are compounds having a diamondoid nucleus in which one or more of the diamondoid nucleus carbons has been substitutionally replaced with a noncarbon atom. These heteroatom substituents impart desirable properties to the diamondoid. In addition, the heterodiamondoids are functionalized affording compounds carrying one or more functional groups covalently pendant therefrom. This invention is further related to polymerizable functionalized heterodiamondoids. In a preferred aspect of this invention the diamondoid nuclei are triamantane and higher diamondoid nuclei. In another preferred aspect, the heteroatoms are selected to give rise to diamondoid materials which can serve as n- and p-type materials in electronic devices can serve as optically active materials.
    Type: Application
    Filed: December 14, 2009
    Publication date: July 29, 2010
    Applicant: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Publication number: 20100094012
    Abstract: This invention is related to heteroatom containing diamondoids (i.e., “heterodiamondoids”) which are compounds having a diamondoid nucleus in which one or more of the diamondoid nucleus carbons has been substitutionally replaced with a noncarbon atom. These heteroatom substituents impart desirable properties to the diamondoid. In addition, the heterodiamondoids are functionalized affording compounds carrying one or more functional groups covalently pendant therefrom. This invention is further related to polymerizable functionalized heterodiamondoids. In a preferred aspect of this invention the diamondoid nuclei are triamantane and higher diamondoid nuclei. In another preferred aspect, the heteroatoms are selected to give rise to diamondoid materials which can serve as n- and p-type materials in electronic devices can serve as optically active materials.
    Type: Application
    Filed: December 14, 2009
    Publication date: April 15, 2010
    Applicant: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Patent number: 7649056
    Abstract: This invention is related to heteroatom containing diamondoids (i.e., “heterodiamondoids”) which are compounds having a diamondoid nucleus in which one or more of the diamondoid nucleus carbons has been substitutionally replaced with a noncarbon atom. These heteroatom substituents impart desirable properties to the diamondoid. In addition, the heterodiamondoids are functionalized affording compounds carrying one or more functional groups covalently pendant therefrom. This invention is further related to polymerizable functionalized heterodiamondoids. In a preferred aspect of this invention the diamondoid nuclei are triamantane and higher diamondoid nuclei. In another preferred aspect, the heteroatoms are selected to give rise to diamondoid materials which can serve as n- and p-type materials in electronic devices can serve as optically active materials.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: January 19, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
  • Publication number: 20090075203
    Abstract: Novel positive-working photoresist compositions are disclosed. The monomers of the base resin of the resist contain diamondoid-containing pendant groups higher than adamantane in the polymantane series; for example, diamantane, triamantane, tetramantane, pentamantane, hexamantane, etc. The diamondoid-containing pendant group may have hydrophilic-enhancing substituents such as a hydroxyl group, and may contain a lactone group. Advantages of the present compositions include enhanced resolution, sensitivity, and adhesion to the substrate.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 19, 2009
    Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
  • Patent number: 7488565
    Abstract: Novel positive-working photoresist compositions are disclosed. The monomers of the base resin of the resist contain diamondoid-containing pendant groups higher than adamantane in the polymantane series; for example, diamantane, triamantane, tetramantane, pentamantane, hexamantane, etc. The diamondoid-containing pendant group may have hydrophilic-enhancing substituents such as a hydroxyl group, and may contain a lactone group. Advantages of the present compositions include enhanced resolution, sensitivity, and adhesion to the substrate.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: February 10, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
  • Publication number: 20080300317
    Abstract: This invention relates to diamondoid derivatives which exhibit therapeutic activity. Specifically, the diamondoid derivatives herein exhibit therapeutic effects in the treatment of viral disorders. Also provided are methods of treatment, prevention and inhibition of viral disorders in a subject in need.
    Type: Application
    Filed: May 22, 2008
    Publication date: December 4, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Chu-Yi Yu, Deyuan Kong, Frederick W. Lam, Steven F. Sciamanna, Earl Shelton, Shenggao Liu, Robert M. Carlson
  • Publication number: 20080293685
    Abstract: This invention relates to diamondoid derivatives which exhibit therapeutic activity. Specifically, the diamondoid derivatives herein exhibit therapeutic effects in the treatment of viral disorders. Also provided are methods of treatment, prevention and inhibition of viral disorders in a subject in need.
    Type: Application
    Filed: May 22, 2008
    Publication date: November 27, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Deyuan Kong, Frederick W. Lam, Steven F. Sciamanna, Earl Shelton, Shenggao Liu, Robert M. Carlson
  • Patent number: 7402835
    Abstract: These heterodiamondoids are diamondoids that include heteroatoms in the diamond lattice structure. The heteroatoms may be either electron donating, such that an n-type heterodiamondoid is created, or electron withdrawing, such that a p-type heterodiamondoid is made. Bulk materials may be fabricated from these heterodiamondoids, and the techniques involved include chemical vapor deposition, polymerization, and crystal aggregation. Junctions may be made from the p-type and n-type heterodiamondoid based materials, and microelectronic devices may be made that utilize these junctions. The devices include diodes, bipolar junction transistors, and field effect transistors.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: July 22, 2008
    Assignee: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
  • Patent number: 7402716
    Abstract: Novel compounds having a hybrid cubic/hexagonal diamond crystal structure are disclosed. Each of the four compounds have the stoichiometric formula C26H32 and a molecular weight of 344. The four compounds are contemplated to have a utility in diamond film nucleation.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: July 22, 2008
    Assignee: Chevron U.S.A. Inc.
    Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
  • Publication number: 20080094723
    Abstract: Novel optical devices based on diamondoid-containing materials are disclosed. Materials that may be fabricated from diamondoids included diamondoid nucleated CVD films, diamondoid-containing CVD films, molecular crystals, and polymerized materials. Devices that may be fabricated from the diamondoid-containing materials disclosed herein include solid state dye lasers, semiconductor lasers, light emitting diodes, photodetectors, photoresistors, phototransistors, photovoltaic cells, solar cells, anti-reflection coatings, lenses, mirrors, pressure windows, optical waveguides, and particle and radiation detectors.
    Type: Application
    Filed: December 22, 2006
    Publication date: April 24, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
  • Publication number: 20080094722
    Abstract: Novel optical devices based on diamondoid-containing materials are disclosed. Materials that may be fabricated from diamondoids included diamondoid nucleated CVD films, diamondoid-containing CVD films, molecular crystals, and polymerized materials. Devices that may be fabricated from the diamondoid-containing materials disclosed herein include solid state dye lasers, semiconductor lasers, light emitting diodes, photodetectors, photoresistors, phototransistors, photovoltaic cells, solar cells, anti-reflection coatings, lenses, mirrors, pressure windows, optical waveguides, and particle and radiation detectors.
    Type: Application
    Filed: December 22, 2006
    Publication date: April 24, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
  • Publication number: 20080094724
    Abstract: Novel optical devices based on diamondoid-containing materials are disclosed. Materials that may be fabricated from diamondoids included diamondoid nucleated CVD films, diamondoid-containing CVD films, molecular crystals, and polymerized materials. Devices that may be fabricated from the diamondoid-containing materials disclosed herein include solid state dye lasers, semiconductor lasers, light emitting diodes, photodetectors, photoresistors, phototransistors, photovoltaic cells, solar cells, anti-reflection coatings, lenses, mirrors, pressure windows, optical waveguides, and particle and radiation detectors.
    Type: Application
    Filed: December 22, 2006
    Publication date: April 24, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
  • Publication number: 20080009546
    Abstract: This invention relates to diamondoid derivatives which exhibit therapeutic activity. Specifically, the diamondoid derivatives herein exhibit therapeutic effects in the treatment of neurologic disorders. Also provided are methods of treatment, prevention and inhibition of neurologic disorders in a subject in need.
    Type: Application
    Filed: April 17, 2007
    Publication date: January 10, 2008
    Applicant: Chevron U.S.A. Inc.
    Inventors: Shenggao Liu, Frederick Lam, Steve Sciamanna, Robert Carlson, Jeremy Dahl