Patents by Inventor Zhicheng Hu

Zhicheng Hu 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: 20200266700
    Abstract: Some aspects of the present disclosure provide for a circuit. In at least some examples, the circuit includes an integrator coupled between a first node and a second node and a filter coupled between the second node and a third node. The circuit further includes a buffer coupled between the third node and a fourth node and a first switch coupled between the fourth node and a fifth node. The circuit further includes a first capacitor coupled between the fifth node and a ground node, a first resistor comprising a first terminal coupled to the fifth node and a second terminal, a second switch coupled between the second terminal of the first resistor and the ground node.
    Type: Application
    Filed: September 4, 2019
    Publication date: August 20, 2020
    Inventors: Jiancong RUAN, Runqin TAN, Zhicheng HU
  • Publication number: 20200172479
    Abstract: A preparing method for high-purity levetiracetam, comprising: adjusting the pH of an extracted aqueous layer obtained by dissociating (S)-?-ethyl-2-oxo-1-pyrrolidineacetic acid (R)-methylbenzylamine salt to 5-9; removing water; adding an organic solvent to form a solution and then performing an esterification reaction with ethyl chloroformate or methylchlorofonmate; and carrying out an ammonolysis reaction to obtain the levetiracetam. The method simplifies production process, increases yield, reduces or even avoids the use of triethylamine in the esterification process, and reduces the emission of a great amount of three wastes.
    Type: Application
    Filed: August 9, 2018
    Publication date: June 4, 2020
    Inventors: Xinlei Chen, Zhicheng Hu, Liang Zheng, Peng Dong
  • Patent number: 7811962
    Abstract: Provided are methods for manufacturing a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, substantially free of platinum group metal components, and at least one catalytic layer.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: October 12, 2010
    Assignee: BASF Corporation
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen, Harold N. Rabinowitz, Christopher M. Minnella, Aaron N. Israel
  • Patent number: 7795172
    Abstract: A layered exhaust treatment catalyst comprising: (a) a carrier such as cordierite; (b) a first layer deposited on the carrier comprising a palladium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina; and (c) a second layer deposited on the first layer comprising a rhodium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. Preferably, the catalyst also includes a bottom layer interposed between the carrier and the first layer. The bottom layer comprises an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. The amount of the oxygen storage component of the catalyst may be “tuned”, i.e., adjusted, to meet the needs of a vehicle's on-board diagnostic (“OBD”) catalyst efficiency monitoring system, without adversely affecting the performance of the catalyst.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: September 14, 2010
    Assignee: BASF Corporation
    Inventors: John S. Foong, Zhicheng Hu
  • Patent number: 7501098
    Abstract: Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises a carrier; a first layer deposited on the carrier, said first layer comprising substantially only at least one refractory metal oxide; a second layer deposited on the first layer, said second layer comprising substantially only at least one oxygen storage component and at least one binder therefore; and a third layer deposited on the second layer, said third layer comprising at least one layer of one or more platinum group metal components supported on a refractory metal oxide support.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: March 10, 2009
    Assignee: BASF Catalysts LLC
    Inventors: Shau-Lin Franklin Chen, Zhicheng Hu
  • Publication number: 20090042722
    Abstract: Provided are methods for manufacturing a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, substantially free of platinum group metal components, and at least one catalytic layer.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 12, 2009
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen, Harold N. Rabinowitz, Christopher M. Minnella, Aaron N. Israel
  • Publication number: 20080226514
    Abstract: Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises a carrier; a first layer deposited on the carrier, said first layer comprising substantially only at least one refractory metal oxide; a second layer deposited on the first layer, said second layer comprising substantially only at least one oxygen storage component and at least one binder therefore; and a third layer deposited on the second layer, said third layer comprising at least one layer of one or more platinum group metal components supported on a refractory metal oxide support.
    Type: Application
    Filed: February 26, 2008
    Publication date: September 18, 2008
    Inventors: Shau-Lin Franklin Chen, Zhicheng Hu
  • Patent number: 7374729
    Abstract: Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises: (a) a carrier; (b) a first layer deposited on the carrier, said first layer comprising substantially only at least one refractive metal oxide; (c) a second layer deposited on the first layer, said second layer comprising substantially only at least one oxygen storage component and at least one binder therefor; and (d) a third layer deposited on the second layer, said third layer comprising at least one layer of one or more platinum group metal components supported on a refractory metal oxide support. Optionally, a fourth layer is deposited on the third layer wherein the fourth layer comprises one or more platinum group metal components supported on a refractory metal oxide support. As a further option, an overcoat layer may be deposited on the third or fourth layer wherein the overcoat layer comprises a catalyst poison sorbent.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: May 20, 2008
    Assignee: BASF Catalysts LLC
    Inventors: Shau-Lin Franklin Chen, Zhicheng Hu
  • Publication number: 20080016857
    Abstract: Provided is a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, and at least one catalytic layer. Also provided are methods for preparing the catalyst and methods for monitoring the oxygen storage capacity of an exhaust article containing the catalyst.
    Type: Application
    Filed: May 23, 2007
    Publication date: January 24, 2008
    Applicants: BASF Catalysts LLC
    Inventors: Zhicheng Hu, Patrick Burk, Shau-Lin Chen, Harold Rabinowitz, Christopher Minnella, Aaron Israel
  • Patent number: 7276212
    Abstract: Provided is a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, and at least one catalytic layer. Also provided are methods for preparing the catalyst and methods for monitoring the oxygen storage capacity of an exhaust article containing the catalyst.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: October 2, 2007
    Assignee: Engelhard Corporation
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen, Harold N. Rabinowitz, Christopher M. Minnella, Aaron N. Israel
  • Patent number: 7083829
    Abstract: A method and apparatus for treating the atmosphere comprising moving a vehicle through the atmosphere, the vehicle having at least one atmosphere contacting surface and a pollutant treating composition located on said surface. A specific embodiment comprises coating a motor vehicle radiator with pollutant treating catalyst.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: August 1, 2006
    Assignee: Engelhard Corporation
    Inventors: Jeffrey B. Hoke, Fred M. Allen, Patrick W. Blosser, Zhicheng Hu, Ronald M. Heck
  • Patent number: 7037875
    Abstract: A support for a catalyst for controlling vehicular exhaust emissions comprising a high surface area refractory metal oxide, e.g., gamma-alumina, having a monomolecular layer of a second oxide selected from the group consisting of titanium dioxide, cerium dioxide and zirconium dioxide. Typically, the monomolecular layer will have a thickness of less than about 10 angstroms. The support may be converted into a vehicular exhaust emission control catalyst by depositing the support on a substrate such as cordierite depositing a precious metal component such as platinum on at least part of the monomolecular layer. Preferably, the catalyst will also contain at least one NOx storage component deposited on at least part of the monomolecular layer. Catalysts prepared using the catalyst supports of the invention exhibit outstanding thermal stability and resistance to sulfur poisoning.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: May 2, 2006
    Assignee: Engelhard Corporation
    Inventors: Zhicheng Hu, Knut Wasserman, Patrick L. Burk, Youchang Xie, Wei Lin
  • Publication number: 20050282701
    Abstract: A layered exhaust treatment catalyst comprising: (a) a carrier such as cordierite; (b) a first layer deposited on the carrier comprising a palladium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina; and (c) a second layer deposited on the first layer comprising a rhodium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. Preferably, the catalyst also includes a bottom layer interposed between the carrier and the first layer. The bottom layer comprises an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. The amount of the oxygen storage component of the catalyst may be “tuned”, i.e., adjusted, to meet the needs of a vehicle's on-board diagnostic (“OBD”) catalyst efficiency monitoring system, without adversely affecting the performance of the catalyst.
    Type: Application
    Filed: June 22, 2004
    Publication date: December 22, 2005
    Inventors: John Foong, Zhicheng Hu
  • Publication number: 20050227867
    Abstract: Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises: (a) a carrier; (b) a first layer deposited on the carrier, said first layer comprising substantially only at least one refractive metal oxide; (c) a second layer deposited on the first layer, said second layer comprising substantially only at least one oxygen storage component and at least one binder therefor; and (d) a third layer deposited on the second layer, said third layer comprising at least one layer of one or more platinum group metal components supported on a refractory metal oxide support. Optionally, a fourth layer is deposited on the third layer wherein the fourth layer comprises one or more platinum group metal components supported on a refractory metal oxide support. As a further option, an overcoat layer may be deposited on the third or fourth layer wherein the overcoat layer comprises a catalyst poison sorbent.
    Type: Application
    Filed: March 30, 2004
    Publication date: October 13, 2005
    Inventors: Shau-Lin Chen, Zhicheng Hu
  • Publication number: 20050100492
    Abstract: A method and apparatus for treating the atmosphere comprising moving a vehicle through the atmosphere, the vehicle having at least one atmosphere contacting surface and a pollutant treating composition located on said surface. A specific embodiment comprises coating a motor vehicle radiator with pollutant treating catalyst.
    Type: Application
    Filed: October 12, 2004
    Publication date: May 12, 2005
    Applicant: ENGELHARD CORPORATION
    Inventors: Jeffrey Hoke, Fred Allen, Patrick Blosser, Zhicheng Hu, Ronald Heck
  • Patent number: 6818254
    Abstract: A method and apparatus for treating the atmosphere comprising moving a vehicle through the atmosphere, the vehicle having at least one atmosphere contacting surface and a pollutant treating composition located on said surface. A specific embodiment comprises coating a motor vehicle radiator with pollutant treating catalyst.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: November 16, 2004
    Assignee: Engelhard Corporation
    Inventors: Jeffrey B. Hoke, Fred M. Allen, Patrick W. Blosser, Zhicheng Hu, Ronald M. Heck
  • Publication number: 20040198592
    Abstract: A support for a catalyst for controlling vehicular exhaust emissions comprising a high surface area refractory metal oxide, e.g., gamma-alumina, having a monomolecular layer of a second oxide selected from the group consisting of titanium dioxide, cerium dioxide and zirconium dioxide. Typically, the monomolecular layer will have a thickness of less than about 10 angstroms. The support may be converted into a vehicular exhaust emission control catalyst by depositing the support on a substrate such as cordierite depositing a precious metal component such as platinum on at least part of the monomolecular layer. Preferably, the catalyst will also contain at least one NOx storage component deposited on at least part of the monomolecular layer. Catalysts prepared using the catalyst supports of the invention exhibit outstanding thermal stability and resistance to sulfur poisoning.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 7, 2004
    Applicant: ENGELHARD CORPORATION
    Inventors: Zhicheng Hu, Knut Wassermann, Patrick L. Burk, Youchang Xie, Wei Lin
  • Publication number: 20040166036
    Abstract: A catalyst system combining a low temperature conversion catalyst (LTC), a hydrocarbon adsorbent and, optionally, a three-way catalyst (TWC), is designed to achieve an ultra low vehicle emission standard for internal combustion engine powered vehicles, while never exposing the low temperature conversion catalyst to a temperature in excess of about 550° C.
    Type: Application
    Filed: February 20, 2004
    Publication date: August 26, 2004
    Applicant: ENGELHARD CORPORATION
    Inventors: Shau-Lin F. Chen, Ronald M. Heck, Zhicheng Hu, Michel Deeba
  • Publication number: 20030175192
    Abstract: The present invention relates to a method and a catalyst composite useful for reducing contaminants in exhaust gas streams containing sulfur oxide contaminants. The method for removing NOx and SOx contaminants from a gaseous stream comprises providing a catalyst composite having a downstream section and an upstream section. The downstream section comprises a first support, a first platinum component, and a NOx sorbent component. The upstream section comprises a second support, a second platinum component, and a SOx sorbent component selected from the group consisting of oxides of Mg, Sr, and Ba. In a sorbing period, a lean gaseous stream comprising NOx and SOx is passed through the upstream section to sorb at least some of the SOx contaminants. The downstream section sorbs and abates the NOx in the gaseous stream.
    Type: Application
    Filed: February 4, 2003
    Publication date: September 18, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen
  • Publication number: 20030061860
    Abstract: Provided is a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, and at least one catalytic layer. Also provided are methods for preparing the catalyst and methods for monitoring the oxygen storage capacity of an exhaust article containing the catalyst.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 3, 2003
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen, Harold N. Rabinowitz, Christopher M. Minnella, Aaron N. Israel