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).
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Patent number: 8420768Abstract: 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: GrantFiled: December 20, 2010Date of Patent: April 16, 2013Assignee: Chevron U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
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Patent number: 8013078Abstract: 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: GrantFiled: December 14, 2009Date of Patent: September 6, 2011Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Patent number: 7981975Abstract: 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: GrantFiled: December 14, 2009Date of Patent: July 19, 2011Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Publication number: 20110112258Abstract: 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: ApplicationFiled: December 20, 2010Publication date: May 12, 2011Applicant: Chevron U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
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Patent number: 7884256Abstract: 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: GrantFiled: December 17, 2004Date of Patent: February 8, 2011Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Patent number: 7795468Abstract: 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: GrantFiled: December 6, 2002Date of Patent: September 14, 2010Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl, Waqar R. Qureshi
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Publication number: 20100221453Abstract: 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: ApplicationFiled: May 20, 2010Publication date: September 2, 2010Applicant: Chevron U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu, Waqar R. Queshi, Wasiq Bokhari
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Publication number: 20100190985Abstract: 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: ApplicationFiled: December 14, 2009Publication date: July 29, 2010Applicant: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Publication number: 20100094012Abstract: 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: ApplicationFiled: December 14, 2009Publication date: April 15, 2010Applicant: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Patent number: 7649056Abstract: 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: GrantFiled: January 18, 2006Date of Patent: January 19, 2010Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Robert M. Carlson, Jeremy E. Dahl
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Publication number: 20090075203Abstract: 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: ApplicationFiled: August 28, 2008Publication date: March 19, 2009Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
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Patent number: 7488565Abstract: 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: GrantFiled: January 23, 2004Date of Patent: February 10, 2009Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
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Publication number: 20080300317Abstract: 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: ApplicationFiled: May 22, 2008Publication date: December 4, 2008Applicant: Chevron U.S.A. Inc.Inventors: Chu-Yi Yu, Deyuan Kong, Frederick W. Lam, Steven F. Sciamanna, Earl Shelton, Shenggao Liu, Robert M. Carlson
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Publication number: 20080293685Abstract: 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: ApplicationFiled: May 22, 2008Publication date: November 27, 2008Applicant: Chevron U.S.A. Inc.Inventors: Deyuan Kong, Frederick W. Lam, Steven F. Sciamanna, Earl Shelton, Shenggao Liu, Robert M. Carlson
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Patent number: 7402835Abstract: 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: GrantFiled: July 16, 2003Date of Patent: July 22, 2008Assignee: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Jeremy E. Dahl, Robert M. Carlson
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Patent number: 7402716Abstract: 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: GrantFiled: December 8, 2004Date of Patent: July 22, 2008Assignee: Chevron U.S.A. Inc.Inventors: Jeremy E. Dahl, Robert M. Carlson, Shenggao Liu
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Publication number: 20080094723Abstract: 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: ApplicationFiled: December 22, 2006Publication date: April 24, 2008Applicant: Chevron U.S.A. Inc.Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
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Publication number: 20080094722Abstract: 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: ApplicationFiled: December 22, 2006Publication date: April 24, 2008Applicant: Chevron U.S.A. Inc.Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
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Publication number: 20080094724Abstract: 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: ApplicationFiled: December 22, 2006Publication date: April 24, 2008Applicant: Chevron U.S.A. Inc.Inventors: Jeremy Dahl, Robert Carlson, Shenggao Liu
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Publication number: 20080009546Abstract: 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: ApplicationFiled: April 17, 2007Publication date: January 10, 2008Applicant: Chevron U.S.A. Inc.Inventors: Shenggao Liu, Frederick Lam, Steve Sciamanna, Robert Carlson, Jeremy Dahl