Patents by Inventor Changjun Zhou

Changjun Zhou 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: 9458703
    Abstract: A carbonaceous particulate material is provided that is characterized by having a reversible volumetric expansion/contraction in fluid media (“VR”) of greater than or equal to (?)3% between 4,000 psi and 10,000 psi. The porous carbonaceous particulate material of the present disclosure is also characterized by having a true density, (“PT”), of 1.2 g/cc?PT?2.0 g/cc, when milled to ?200 mesh and has a d50 particle size distribution of about 15 ?m. This is the consequence of the instant material exhibiting a high level of closed porosity with very small pores, in contrast with prior art materials that would have a wider range pore sizes for the closed pores.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: October 4, 2016
    Assignee: Superior Graphite Co.
    Inventors: Changjun Zhou, Richard D. Nelson
  • Patent number: 9206681
    Abstract: An assembly for the test chamber of a wellbore fluid testing apparatus for simulating fractures in a wellbore is provided comprising base plate of a first diameter having an aperture therethrough configured to be removably secured within the test chamber. A solid end plate of a second diameter smaller than the first diameter is provided that is removably secured to the base plate. One or more intermediate plates is provided that is located between the base plate and the end plate, each intermediate plate also having an aperture therethrough. At least one shim or spacer is provided to space the intermediate plates from any adjacent intermediate plate and/or to space the end plate from the adjacent intermediate plate. The spacer is configured to be removably secured to the assembly and to permit fluid flow in in the assembly through the aperture in the base plate and the opposed face of the intermediate plate and an adjacent intermediate plate or the base plate.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: December 8, 2015
    Assignee: Superior Graphite Co.
    Inventors: Changjun Zhou, James L. Bruley, Jess Maruri Garcia
  • Publication number: 20150184495
    Abstract: A carbonaceous particulate material is provided that is characterized by having a reversible volumetric expansion/contraction in fluid media (“VR”) of greater than or equal to (?)3% between 4,000 psi and 10,000 psi. The porous carbonaceous particulate material of the present disclosure is also characterized by having a true density, (“PT”), of 1.2 g/cc?PT?2.0 g/cc, when milled to?-200 mesh and has a d50 particle size distribution of about 15 ?m. This is the consequence of the instant material exhibiting a high level of closed porosity with very small pores, in contrast with prior art materials that would have a wider range pore sizes for the closed pores.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 2, 2015
    Applicant: SUPERIOR GRAPHITE CO.
    Inventors: Changjun Zhou, Richard D. Nelson
  • Patent number: 8999898
    Abstract: A method for controlling the loss of drilling fluid from an oil well borehole into formations penetrated by a drill bit is disclosed by which resilient graphitic carbon particles having a resiliency greater than about 130% rebound after compression to 10,000 psi; a degree of graphitization greater than 85%, as measured by d002 using XRD; an average pore size larger than 0.035 micron; and an aspect ratio smaller than 0.63 are added to the drilling fluid.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Superior Graphite Co.
    Inventors: Changjun Zhou, David J. Derwin, Frank A. Wawrzos
  • Publication number: 20140274816
    Abstract: A method for controlling the loss of drilling fluid from an oil well borehole into formations penetrated by a drill bit is disclosed by which resilient graphitic carbon particles having a resiliency greater than about 130% rebound after compression to 10,000 psi; a degree of graphitization greater than 85%, as measured by d002 using XRD; an average pore size larger than 0.035 micron; and an aspect ratio smaller than 0.63 are added to the drilling fluid.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Superior Graphite Co.
    Inventors: Changjun Zhou, David J. Derwin, Frank A. Wawrzos
  • Publication number: 20140216149
    Abstract: An assembly for the test chamber of a wellbore fluid testing apparatus for simulating fractures in a wellbore is provided comprising base plate of a first diameter having an aperture therethrough configured to be removably secured within the test chamber. A solid end plate of a second diameter smaller than the first diameter is provided that is removably secured to the base plate. One or more intermediate plates is provided that is located between the base plate and the end plate, each intermediate plate also having an aperture therethrough. At least one shim or spacer is provided to space the intermediate plates from any adjacent intermediate plate and/or to space the end plate from the adjacent intermediate plate. The spacer is configured to be removably secured to the assembly and to permit fluid flow in in the assembly through the aperture in the base plate and the opposed face of the intermediate plate and an adjacent intermediate plate or the base plate.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 7, 2014
    Applicant: SUPERIOR GRAPHITE CO.
    Inventors: Changjun Zhou, James L. Bruley, Jess Maruri Garcia
  • Patent number: 8617309
    Abstract: A method for improving the thermal characteristics of cement compositions is provided in which fine resilient graphitic carbon particles (“RGC”) are substituted for a portion of the fine aggregate (typically sand) in the cement formulation. For the purposes of the present disclosure, “fine” is intended to describe particulates having a mesh size of less than about 8 mesh, or a particle size of less than about 2.38 mm, or, more preferably when referring to RGC, a mesh size of less than about 16 mesh and a particle size of less than about 1.19 mm. “Resilient” is intended to describe graphitic carbon particles that exhibit a rebound of at least about 20% after compression to 10,000 psi.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: December 31, 2013
    Assignee: Superior Graphite Co.
    Inventors: Peter Roy Carney, Craig Allen Baer, David J. Derwin, Changjun Zhou, Frank A. Wawrzos, Marcin Tlustochowicz
  • Patent number: 7579003
    Abstract: The present invention provides a combined vaccine that includes hepatitis B vaccine (HeVac) and Bacille Calmette-Guerin (BCG) for intracutaneous injection and the method of preparation of such vaccine. The combined vaccine changes the now used liquid agent of the HeVac into a cryoprotectant, thus improving the heat stability of the HBsAg. Because of the cryoprotectant in the combined vaccine, the heat stability of the HBsAg is improved, and the efficacy of the vaccine is only slightly decreased after 30 days at 37° C., and the decrease is lower than with the liquid agent of the HeVac. The present invention changes the newborn's inoculation from two injections into one to simultaneously obtain prophylaxis of hepatitis B and tuberculosis.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: August 25, 2009
    Assignee: Changchun Institute of Biological Products
    Inventors: Lijie Jin, Zhi Wang, Xiaolin Zhao, Lihua Yang, Wange Chen, Aidong Yu, Junye Sun, Fuxue Zou, Yanming Liu, Aihong Liu, Lihong Yu, Yan Cai, Manlun Yu, Yuwu Wang, Changjun Zhou, Tong Yang, Dejuan Li, Xuan Luo, Li Li
  • Publication number: 20060257423
    Abstract: The present invention provides a combined vaccine that includes hepatitis B vaccine (HeVac) and Bacille Calmette-Guerin (BCG) for intracutaneous injection and the method of preparation of such vaccine. The combined vaccine changes the now used liquid agent of the HeVac into a cryoprotectant, thus improving the heat stability of the HBsAg. Because of the cryoprotectant in the combined vaccine, the heat stability of the HBsAg is improved, and the efficacy of the vaccine is only slightly decreased after 30 days at 37° C., and the decrease is lower than with the liquid agent of the HeVac. The present invention changes the newborn's inoculation from two injections into one to simultaneously obtain prophylaxis of hepatitis B and tuberculosis.
    Type: Application
    Filed: May 26, 2004
    Publication date: November 16, 2006
    Inventors: Lijie Jin, Zhi Wang, Xiaolin Zhao, Lihua Yang, Wange Chen, Aidong Yu, Junye Sun, Fuxue Zou, Yanming Liu, Aihong Liu, Lihong Yu, Yan Cai, Manlun Yu, Yuwu Wang, Changjun Zhou, Tong Yang, Dejuan Li, Xuan Luo, Li Li