Patents by Inventor Dongxia Liu

Dongxia 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: 10618003
    Abstract: Exhaust gas catalysts are disclosed. One exhaust gas catalyst comprises a noble metal and a molecular sieve, and has an infrared spectrum having a characteristic absorption peak from 750 cm?1 to 1050 cm?1 in addition to the absorption peaks for the molecular sieve itself. The exhaust gas catalyst also comprises a noble metal and a molecular sieve, having greater than 5 percent of the noble metal amount located inside pores of the molecular sieve. The exhaust gas catalyst also comprises a first and second molecular sieve catalyst. The first molecular sieve catalyst comprises a first noble metal and a first molecular sieve, and the second molecular sieve catalyst comprises a second noble metal and a second molecular sieve. The first and second molecular sieves are different. The invention also includes exhaust systems comprising the exhaust gas catalysts, and a method for treating exhaust gas utilizing the exhaust gas catalysts.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: April 14, 2020
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Raj Rao Rajaram, Fiona-Mairead McKenna, Hai-Ying Chen, Dongxia Liu
  • Patent number: 10525407
    Abstract: Non-oxidative direct methane conversion (NDMC) to value-added products, such as H2, C2 hydrocarbons, and aromatics, occurs within a reactor heated to an elevated temperature. The reactor can have a first volume, where a feed gas including methane is provided, separated from a second volume, where a sweep gas is provided, by a dense thin film membrane supported on a porous wall. The thin film membrane is a mixed ionic-electronic permeable membrane that allows H2 generated in the first volume to be transported to the second volume for removal by (or reaction with) the sweep gas. A catalyst can be provided in or adjacent to the first volume. For example, the catalyst can be a metal doped quartz material (e.g., Fe(c)SiO2) or a metal/zeolite material (e.g., Mo/ZSM5). Methane conversion and/or product selectivity in the reactor can be manipulated by control of gas flow rates, reaction temperatures, and/or feed and sweep gas compositions.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: January 7, 2020
    Assignee: University of Maryland, College Park
    Inventors: Eric D. Wachsman, Dongxia Liu
  • Publication number: 20190001268
    Abstract: A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone includes a passive NOx adsorber (PNA), and an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer with a second SCR catalyst, the top layer located over the bottom layer.
    Type: Application
    Filed: March 29, 2018
    Publication date: January 3, 2019
    Inventors: Hai-Ying CHEN, Joseph Michael FEDEYKO, Dongxia LIU, Jing LU
  • Publication number: 20180296974
    Abstract: Non-oxidative direct methane conversion (NDMC) to value-added products, such as H2, C2 hydrocarbons, and aromatics, occurs within a reactor heated to an elevated temperature. The reactor can have a first volume, where a feed gas including methane is provided, separated from a second volume, where a sweep gas is provided, by a dense thin film membrane supported on a porous wall. The thin film membrane is a mixed ionic-electronic permeable membrane that allows H2 generated in the first volume to be transported to the second volume for removal by (or reaction with) the sweep gas. A catalyst can be provided in or adjacent to the first volume. For example, the catalyst can be a metal doped quartz material (e.g., Fe(c)SiO2) or a metal/zeolite material (e.g., Mo/ZSM5). Methane conversion and/or product selectivity in the reactor can be manipulated by control of gas flow rates, reaction temperatures, and/or feed and sweep gas compositions.
    Type: Application
    Filed: October 6, 2016
    Publication date: October 18, 2018
    Inventors: Eric D. WACHSMAN, Dongxia LIU
  • Publication number: 20180283250
    Abstract: A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone comprises a passive NOx adsorber (PNA) comprising a platinum group metal and a base metal, both on a molecular sieve, and an ammonia slip catalyst (ASC) comprising an oxidation catalyst comprising a platinum group metal on a support, and a first SCR catalyst; where the second zone comprises a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer including a blend of: (1) the oxidation catalyst and (2) the first SCR catalyst; and a top layer including a second SCR catalyst, the top layer located over the bottom layer.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 4, 2018
    Inventors: Hai-Ying CHEN, John KILMARTIN, Dongxia LIU, Jing LU, Desiree DURAN-MARTIN, Raj RAJARAM
  • Patent number: 10005075
    Abstract: A passive NOx adsorber is disclosed. The passive NOx adsorber is effective to adsorb NOx at or below a low temperature and release the adsorbed NOx at temperatures above the low temperature. The passive NOx adsorber comprises a noble metal and a small pore molecular sieve. The small pore molecular sieve has a maximum ring size of eight tetrahedral atoms. The invention also includes an exhaust system comprising the passive NOx adsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NOx adsorber.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: June 26, 2018
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Raj Rao Rajaram, Hai-Ying Chen, Dongxia Liu
  • Patent number: 9849168
    Abstract: Disclosed are an attenuated live vaccine against mycoplasmal pneumonia of swine (MPS) and use thereof. In the present invention, pathological lung tissues of swine having typical Mycoplasma hyopneumoniae (Mhp) infection and no obvious other pathogenic infections are screened, and subcultured 100 generations in lungs of newborn rabbits; then, Mhp strains are isolated and serially subcultured in a medium; and the Mhp strain AN306 is obtained by screening a plurality of strains, which is deposited with an accession number: CCTCC NO. M2012431. Also disclosed is a live vaccine formulation against MPS prepared on the basis of the attenuated strain and comprising live attenuated strain, a pharmaceutically acceptable carrier or excipient, and optionally an adjuvant and immunogens of other pathogens.
    Type: Grant
    Filed: January 26, 2014
    Date of Patent: December 26, 2017
    Assignee: JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
    Inventors: Guoqinq Shao, Qiyan Xiong, Maojun Liu, Zhixin Feng, Yanna Wei, Haiyan Wang, Fangfang Bai, Yuan Gan, Li Wang, Daohua Zhang, Dongxia Liu, Lizhong Hua, Yuzi Wu, Yun Bai, Zhanwei Wang
  • Publication number: 20160346372
    Abstract: Disclosed are an attenuated live vaccine against mycoplasmal pneumonia of swine (MPS) and use thereof. In the present invention, pathological lung tissues of swine having typical Mycoplasma hyopneumoniae (Mhp) infection and no obvious other pathogenic infections are screened, and subcultured 100 generations in lungs of newborn rabbits; then, Mhp strains are isolated and serially subcultured in a medium; and the Mhp strain AN306 is obtained by screening a plurality of strains, which is deposited with an accession number: CCTCC NO. M2014176. Also disclosed is a live vaccine formulation against MPS prepared on the basis of the attenuated strain and comprising live attenuated strain, a pharmaceutically acceptable carrier or excipient, and optionally an adjuvant and immunogens of other pathogens.
    Type: Application
    Filed: January 26, 2014
    Publication date: December 1, 2016
    Applicant: JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
    Inventors: Guoqinq SHAO, Qiyan XIONG, Maojun LIU, Zhixin FENG, Yanna WEI, Haiyan WANG, Fangfang BAI, Yuan GAN, Li WANG, Daohua ZHANG, Dongxia LIU, Lizhong HUA, Yuzi WU, Yun BAI, Zhanwei WANG
  • Patent number: 9451020
    Abstract: A method and system of distributed communication of independent autonomous vehicles to provide redundancy and performance are disclosed. In one embodiment, a set of autonomous vehicles operates in a geographically proximate area through which peer-to-peer communication sessions are established between nearby ones of the set of autonomous vehicles through an ad-hoc network based on a present geo-spatial location of each one of the set of autonomous vehicles in communication proximity to preferred adjacent ones of the set of autonomous vehicles. A central server directly coupled to each of the set of autonomous vehicles establishes centralized communication paths with each of the set of autonomous vehicles through a wide area network. The centralized server processes a communication from adjacent ones of the set of autonomous vehicles when an error condition is detected in an operational mode of a non-functional vehicle that has lost communication with the central server.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: September 20, 2016
    Assignee: LEGALFORCE, INC.
    Inventors: Dongxia Liu, Hairong Lei, Raj Abhyanker
  • Publication number: 20160021178
    Abstract: A method and system of distributed communication of independent autonomous vehicles to provide redundancy and performance are disclosed. In one embodiment, a set of autonomous vehicles operates in a geographically proximate area through which peer-to-peer communication sessions are established between nearby ones of the set of autonomous vehicles through an ad-hoc network based on a present geo-spatial location of each one of the set of autonomous vehicles in communication proximity to preferred adjacent ones of the set of autonomous vehicles. A central server directly coupled to each of the set of autonomous vehicles establishes centralized communication paths with each of the set of autonomous vehicles through a wide area network. The centralized server processes a communication from adjacent ones of the set of autonomous vehicles when an error condition is detected in an operational mode of a non-functional vehicle that has lost communication with the central server.
    Type: Application
    Filed: July 18, 2014
    Publication date: January 21, 2016
    Inventors: Dongxia Liu, Hairong Lei, Raj Abhyanker
  • Publication number: 20150157982
    Abstract: Exhaust gas catalysts are disclosed. One exhaust gas catalyst comprises a noble metal and a molecular sieve, and has an infrared spectrum having a characteristic absorption peak from 750 cm?1 to 1050 cm?1 in addition to the absorption peaks for the molecular sieve itself. The exhaust gas catalyst also comprises a noble metal and a molecular sieve, having greater than 5 percent of the noble metal amount located inside pores of the molecular sieve. The exhaust gas catalyst also comprises a first and second molecular sieve catalyst. The first molecular sieve catalyst comprises a first noble metal and a first molecular sieve, and the second molecular sieve catalyst comprises a second noble metal and a second molecular sieve. The first and second molecular sieves are different. The invention also includes exhaust systems comprising the exhaust gas catalysts, and a method for treating exhaust gas utilizing the exhaust gas catalysts.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 11, 2015
    Inventors: Raj Rao RAJARAM, Fiona-Mairead MCKENNA, Hai-Ying CHEN, Dongxia LIU
  • Publication number: 20150158023
    Abstract: A cold start catalyst is disclosed. The cold start catalyst is effective to adsorb NOx and hydrocarbons (HC) at or below a low temperature and to covert and release the adsorbed NOx and HC at temperatures above the low temperature. The cold start catalyst comprises a molecular sieve catalyst and a supported platinum group metal catalyst. The molecular sieve catalyst consists essentially of a noble metal and a molecular sieve. The supported platinum group metal catalyst comprises one or more platinum group metals and one or more inorganic oxide carriers. The invention also includes an exhaust system comprising the cold start catalyst, and a method for treating exhaust gas from an internal combustion engine utilizing the cold start catalyst.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 11, 2015
    Inventors: Raj Rao RAJARAM, Hai-Ying CHEN, Dongxia LIU
  • Publication number: 20150158019
    Abstract: A passive NOx adsorber is disclosed. The passive NOx adsorber is effective to adsorb NOx at or below a low temperature and release the adsorbed NOx at temperatures above the low temperature. The passive NOx adsorber comprises a noble metal and a small pore molecular sieve. The small pore molecular sieve has a maximum ring size of eight tetrahedral atoms. The invention also includes an exhaust system comprising the passive NOx adsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NOx adsorber.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 11, 2015
    Inventors: Raj Rao RAJARAM, Hai-Ying CHEN, Dongxia LIU
  • Patent number: 8129072
    Abstract: A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: March 6, 2012
    Assignee: University of Rochester
    Inventors: Matthew Yates, Dongxia Liu
  • Publication number: 20110192727
    Abstract: A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
    Type: Application
    Filed: April 11, 2011
    Publication date: August 11, 2011
    Applicant: UNIVERSITY OF ROCHESTER
    Inventors: Matthew Yates, Dongxia Liu
  • Patent number: 7943269
    Abstract: A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: May 17, 2011
    Assignee: University of Rochester
    Inventors: Matthew Yates, Dongxia Liu
  • Publication number: 20110066648
    Abstract: Simultaneous reservation of brand identity is disclosed. In one embodiment a method to simultaneous reserve online brand identity includes initiating a simultaneous search responsive to a single criteria, creating a uniform search result of available internet property such as trademark names, domain names, and/or social media names, searching availability of the internet property related to single search criteria, retaining ownership of matching internet property, registering the internet property, presenting opportunity to users to challenge ownership of the internet property. In another embodiment, a method may include abandoned trademarks responsive to a single search criteria are automatically registered and semantic analysis is performed on search results from the single search criteria.
    Type: Application
    Filed: September 14, 2010
    Publication date: March 17, 2011
    Inventors: Raj Vasant Abhyanker, Dongxia Liu
  • Publication number: 20100015494
    Abstract: A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
    Type: Application
    Filed: February 25, 2009
    Publication date: January 21, 2010
    Applicant: University of Rochester
    Inventors: Matthew Yates, Dongxia Liu