Patents by Inventor Hongfei Ma
Hongfei Ma 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: 11926787Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.Type: GrantFiled: April 21, 2020Date of Patent: March 12, 2024Assignees: PetroChina Company Limited, CNPC Engineering Technology R&D Company LimitedInventors: Shuoqiong Liu, Hua Zhang, Jianzhou Jin, Ming Xu, Yongjin Yu, Fengzhong Qi, Congfeng Qu, Hong Yue, Youcheng Zheng, Wei Li, Yong Ma, Youzhi Zheng, Zhao Huang, Jinping Yuan, Zhiwei Ding, Chongfeng Zhou, Chi Zhang, Zishuai Liu, Hongfei Ji, Yuchao Guo, Xiujian Xia, Yong Li, Jiyun Shen, Huiting Liu, Yusi Feng, Bin Lyu
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Patent number: 11920923Abstract: The present disclosure discloses a water heater, and a scale detection system and method.Type: GrantFiled: September 9, 2021Date of Patent: March 5, 2024Assignee: A. O. Smith CorporationInventors: Tao Chen, Hongfei Ma, Shufeng Liu
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Patent number: 11916083Abstract: A display substrate has an active area which includes a photosensitive region with a light-transmitting channel. The display substrate includes a base, a pixel circuit layer, a first insulating layer and a conductive light-shielding layer. The pixel circuit layer includes pixel circuits and at least one pixel circuit includes a first thin film transistor and a second thin film transistor. The first insulating layer has a first via hole. The conductive light-shielding layer includes a conductive light-shielding pattern that has a first light-transmitting hole. Orthogonal projections of the first light-transmitting hole and of a gap region between the first thin film transistor and the second thin film transistor have a first overlapping region, which the light-transmitting channel penetrates. The conductive light-shielding pattern is coupled with a source electrode or a drain electrode of the first thin film transistor through the first via hole.Type: GrantFiled: June 27, 2020Date of Patent: February 27, 2024Assignees: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.Inventors: Jianbo Xian, Hongfei Cheng, Yongda Ma, Chen Xu, Xueguang Hao
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Patent number: 11773045Abstract: Provided is a photo-oxidation reaction of benzylic C—H bonds of an aromatic compound under the catalysis of an acid catalyst. The method aims to synthesize aromatic acids and acetophenones. The acid catalyst is one of Bronsted acids, including one or a mixture of two or more selected from the group consisting of hydrochloric acid, phosphoric acid, sulfuric acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoromethanesulfonic acid, trifluoroacetic acid, and potassium hydrogen sulfate, as well as N-propylsulfonate pyridinium hydrogensulfate, N-butylsulfonate pyridinium hydrogensulfate, N-propylsulfonate pyridinium trifluoromethanesulfonate, N-butylsulfonate pyridinium trifluoromethanesulfonate, N-propylsulfonate pyridinium tetrafluoroborate, and N-butylsulfonate pyridinium tetrafluoroborate. The oxidation reaction is conducted under mild conditions (normal temperature and pressure) using air or oxygen as the oxidant in the presence of recyclable catalyst and solvent.Type: GrantFiled: January 19, 2022Date of Patent: October 3, 2023Assignee: NANJING TECH UNIVERSITYInventors: Yufeng Li, Hongjun Zhu, Hongfei Ma, Hongzhong Bu, Jieqing Wu, Jiefan Gu, Jiwei Chen, Haoyue Zhang, Chen Wang
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Publication number: 20230242470Abstract: Provided is a photo-oxidation reaction of benzylic C—H bonds of an aromatic compound under the catalysis of an acid catalyst. The method aims to synthesize aromatic acids and acetophenones. The acid catalyst is one of Bronsted acids, including one or a mixture of two or more selected from the group consisting of hydrochloric acid, phosphoric acid, sulfuric acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoromethanesulfonic acid, trifluoroacetic acid, and potassium hydrogen sulfate, as well as N-propylsulfonate pyridinium hydrogensulfate, N-butylsulfonate pyridinium hydrogensulfate, N-propylsulfonate pyridinium trifluoromethanesulfonate, N-butylsulfonate pyridinium trifluoromethanesulfonate, N-propylsulfonate pyridinium tetrafluoroborate, and N-butylsulfonate pyridinium tetrafluoroborate. The oxidation reaction is conducted under mild conditions (normal temperature and pressure) using air or oxygen as the oxidant in the presence of recyclable catalyst and solvent.Type: ApplicationFiled: January 19, 2022Publication date: August 3, 2023Inventors: Yufeng Li, Hongjun Zhu, Hongfei Ma, Hongzhong Bu, Jieqing Wu, Jiefan Gu, Jiwei Chen, Haoyue Zhang, Chen Wang
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Publication number: 20220187065Abstract: The present disclosure discloses a water heater, and a scale detection system and method.Type: ApplicationFiled: September 9, 2021Publication date: June 16, 2022Inventors: Tao CHEN, Hongfei MA, Shufeng LIU
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Patent number: 9587854Abstract: A method of assembling multiple low NOx burners including the step of assembling multiple bodies, each body including a multiple first burner ports connected to a first burner inlet and multiple second burner ports connected to a second burner inlet. The method also including the step of selecting one of the bodies and inserting a first inlet tube into the second burner inlet to provide a fuel/air mixture to the second burner ports at a first rate. The method also including the step of selecting one of the bodies and inserting a second inlet tube into the second burner inlet to provide the fuel/air mixture to the second burner ports at a second rate different than the first rate.Type: GrantFiled: November 12, 2015Date of Patent: March 7, 2017Assignee: A. O. SMITH CORPORATIONInventors: Yonghua Cheng, Liliang Dou, Larry Chanasyk, Dayan Bi, Hongfei Ma
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Publication number: 20160061491Abstract: A method of assembling multiple low NOx burners including the step of assembling multiple bodies, each body including a multiple first burner ports connected to a first burner inlet and multiple second burner ports connected to a second burner inlet. The method also including the step of selecting one of the bodies and inserting a first inlet tube into the second burner inlet to provide a fuel/air mixture to the second burner ports at a first rate. The method also including the step of selecting one of the bodies and inserting a second inlet tube into the second burner inlet to provide the fuel/air mixture to the second burner ports at a second rate different than the first rate.Type: ApplicationFiled: November 12, 2015Publication date: March 3, 2016Inventors: Yonghua Cheng, Liliang Dou, Larry Chanasyk, Dayan Bi, Hongfei Ma
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Patent number: 9212817Abstract: A method of assembling multiple low NOx burners (100), a low NOx burners (100) and a tankless gas-fired water heater (500) are disclosed. The method includes the step of assembling multiple bodies (152), each body (152) includes multiple first burner ports (135) connected to a first burner inlet (125) and multiple second burner ports (150) connected to a second burner inlet (140). The method also includes the step of selecting one of the bodies (152) and inserting a first inlet tube (120, 220, 320, 420) into the second burner inlet (140) to provide a fuel/air mixture to the second burner ports (150) at a first rate. The method also includes the step of selecting one of the bodies (152) and inserting a second inlet tube (120, 220, 320, 420) into the second burner inlet (140) to provide the fuel/air mixture to the second burner ports (150) at a second rate different from the first rate.Type: GrantFiled: December 1, 2010Date of Patent: December 15, 2015Assignee: A. O. SMITH CORPORATIONInventors: Yonghua Cheng, Liliang Dou, Larry Chanasyk, Dayan Bi, Hongfei Ma
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Publication number: 20130247844Abstract: A method of assembling multiple low NOx burners (100), a low NOx burners (100) and a tankless gas-fired water heater (500) are disclosed. The method includes the step of assembling multiple bodies (152), each body (152) includes multiple first burner ports (135) connected to a first burner inlet (125) and multiple second burner ports (150) connected to a second burner inlet (140). The method also includes the step of selecting one of the bodies (152) and inserting a first inlet tube (120, 220, 320, 420) into the second burner inlet (140) to provide a fuel/air mixture to the second burner ports (150) at a first rate. The method also includes the step of selecting one of the bodies (152) and inserting a second inlet tube (120, 220, 320, 420) into the second burner inlet (140) to provide the fuel/air mixture to the second burner ports (150) at a second rate different from the first rate.Type: ApplicationFiled: December 1, 2010Publication date: September 26, 2013Applicant: A. O. SMITH CORPORATIONInventors: Yonghua Cheng, Liliang Dou, Larry Chanasyk, Dayan Bi, Hongfei Ma
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Patent number: 8161918Abstract: A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough.Type: GrantFiled: August 25, 2008Date of Patent: April 24, 2012Assignee: Aos Holding CompanyInventors: Hongfei Ma, Zhihua Zhang, Lei Cao, Hyungsik Lee, Gu Qinghai
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Publication number: 20100043728Abstract: A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough.Type: ApplicationFiled: August 25, 2008Publication date: February 25, 2010Inventors: Hongfei Ma, Zhihua Zhang, Lei Cao, Hyungsik Lee, Gu Qinghai
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Patent number: 7280689Abstract: In order to discourage compression of video and other visual image signal data that accompanies unauthorized reproduction, distribution and storage of such data, the signal data is modified in a manner to be essentially imperceptible but which, when compressed and then decompressed, causes the signal quality to be unacceptable. In one approach, the visual signal is modified directly. In another approach, the signal is first transformed into the same domain where a compression-decompression algorithm encodes and decodes the data, and then the transformed signal is modified so that the quality of the visual signal when decompressed and displayed is unacceptably degraded.Type: GrantFiled: July 5, 2002Date of Patent: October 9, 2007Assignee: QDesign U.S.A., Inc.Inventors: Sergiy Bilobrov, Albert Chau, Ronald H. Gerhards, Jason Lesperance, Hongfei Ma, David Jacques Vaisey, Richard J. Beaton
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Publication number: 20040005077Abstract: In order to discourage compression of video and other visual image signal data that accompanies unauthorized reproduction, distribution and storage of such data, the signal data is modified in a manner to be essentially imperceptible but which, when compressed and then decompressed, causes the signal quality to be unacceptable. In one approach, the visual signal is modified directly. In another approach, the signal is first transformed into the same domain where a compression-decompression algorithm encodes and decodes the data, and then the transformed signal is modified so that the quality of the visual signal when decompressed and displayed is unacceptably degraded.Type: ApplicationFiled: July 5, 2002Publication date: January 8, 2004Inventors: Sergiy Bilobrov, Albert Chau, Ronald H. Gerhards, Jason Lesperance, Hongfei Ma, David Jacques Vaisey, Richard J. Beaton