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).
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Publication number: 20200287704Abstract: The invention relates to the field of strand displacement, and provides a color image encryption method based on a DNA strand displacement analog circuit. Firstly, a reaction module with a light-emitting group and a quenching group is designed through Visual DSD software, and by utilizing the equivalence of a DNA strand displacement reaction module and an ideal reaction module, an analog circuit formed by the DNA strand displacement reaction module can perform analog on the dynamics characteristics of an ideal reaction network formed by the ideal reaction module, wherein the Rössler chaotic system can be described by the idealized reaction network. Secondly, data generated by the DNA strand displacement analog circuit is converted into a chaotic sequence matched with a plaintext image in size after being extended, and finally, the color image encryption effect is achieved through scrambling and diffusion operations.Type: ApplicationFiled: May 22, 2020Publication date: September 10, 2020Inventors: Qiang Zhang, Chengye Zou, Changjun Zhou, Xiaopeng Wei
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Patent number: 9458703Abstract: 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: GrantFiled: December 26, 2013Date of Patent: October 4, 2016Assignee: Superior Graphite Co.Inventors: Changjun Zhou, Richard D. Nelson
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Patent number: 9206681Abstract: 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: GrantFiled: February 7, 2013Date of Patent: December 8, 2015Assignee: Superior Graphite Co.Inventors: Changjun Zhou, James L. Bruley, Jess Maruri Garcia
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Publication number: 20150184495Abstract: 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: ApplicationFiled: December 26, 2013Publication date: July 2, 2015Applicant: SUPERIOR GRAPHITE CO.Inventors: Changjun Zhou, Richard D. Nelson
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Patent number: 8999898Abstract: 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: GrantFiled: March 15, 2013Date of Patent: April 7, 2015Assignee: Superior Graphite Co.Inventors: Changjun Zhou, David J. Derwin, Frank A. Wawrzos
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Publication number: 20140274816Abstract: 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: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: Superior Graphite Co.Inventors: Changjun Zhou, David J. Derwin, Frank A. Wawrzos
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Publication number: 20140216149Abstract: 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: ApplicationFiled: February 7, 2013Publication date: August 7, 2014Applicant: SUPERIOR GRAPHITE CO.Inventors: Changjun Zhou, James L. Bruley, Jess Maruri Garcia
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Patent number: 8617309Abstract: 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: GrantFiled: February 8, 2013Date of Patent: December 31, 2013Assignee: Superior Graphite Co.Inventors: Peter Roy Carney, Craig Allen Baer, David J. Derwin, Changjun Zhou, Frank A. Wawrzos, Marcin Tlustochowicz
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Patent number: 7579003Abstract: 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: GrantFiled: May 26, 2004Date of Patent: August 25, 2009Assignee: Changchun Institute of Biological ProductsInventors: 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
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Publication number: 20060257423Abstract: 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: ApplicationFiled: May 26, 2004Publication date: November 16, 2006Inventors: 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