Patents by Inventor Weifeng Li
Weifeng Li 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: 20240164789Abstract: Disclosed is an occluding stent. The occluding stent includes a distal flange occluding body, a proximal flange occluding body, and a connection portion. External surfaces of the distal flange occluding body and the proximal flange occluding body are both provided with a coating. An external surface of the connection portion is wholly or partially provided with a coating. A first occluding coating is provided between the distal flange occluding body and an inner cavity of the connection portion. The present application overcomes the defect that the existing occluder device for closure of an esophagobronchial fistula is harmful to surrounding tissues, makes the device retractable, enhances the safety of the device, and improves life and treatment of patients. A new safe and effective treatment method for an esophagobronchial fistula is provided.Type: ApplicationFiled: January 30, 2024Publication date: May 23, 2024Inventors: Guoxin ZHANG, Jiwang WANG, Jianyu WEI, Yun WANG, Lurong LI, Weifeng ZHANG, Huaiming SANG, Zhenghua SHEN, Changqing LI, Derong LENG
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Publication number: 20240135211Abstract: Embodiments of this specification provide methods and apparatuses for performing model ownership verification based on an exogenous feature. An implementation of the methods includes: selecting initial samples from an initial sample set to form a selected sample set, processing sample data of the initial samples to obtain transform samples that form a transform sample set, training a meta-classifier based on a target model, an auxiliary model, and the transform sample set, inputting data associated with a suspicious model into the meta-classifier, and determining, based on an output result of the meta-classifier, whether the suspicious model is stolen from a deployment model, wherein the deployment model has feature knowledge of the exogenous feature.Type: ApplicationFiled: December 28, 2023Publication date: April 25, 2024Applicant: Alipay (Hangzhou) Information Technology Co., Ltd.Inventors: Yiming Li, Linghui Zhu, Weifeng Qiu, Yong Jiang, Shutao Xia
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Publication number: 20240120460Abstract: The present disclosure discloses a blended ternary positive-electrode material, a preparation method thereof and a lithium ion battery, and relates to the field of lithium battery technologies. A temperature-sensitive precursor type material is taken as a raw material, a large-particle precursor, a small-particle precursor and lithium sources are presintered to obtain a first presintered material and a second presintered material, presintered materials and binders are then mixed, compacted and punctured to obtain a first to-be-sintered material block and a second to-be-sintered material block, the first to-be-sintered material block and the second to-be-sintered material block are loaded into a sagger together for primary sintering, and using a periphery-center regional mode or an upper-lower-layer distribution mode, the first presintered material is distributed at a periphery or an upper layer, and the second presintered material is distributed at a center or a lower layer.Type: ApplicationFiled: April 20, 2023Publication date: April 11, 2024Applicant: YIBIN LIBODE NEW MATERIAL CO., LTDInventors: Weifeng FAN, Ping ZHANG, Shilin HOU, Bin ZHANG, Cheng LI, Changwang HAO, Zhengqiang WANG
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Publication number: 20240117154Abstract: Disclosed are a vibrating diaphragm of a sound-producing apparatus and the sound-producing apparatus. The vibrating diaphragm includes at least one elastomer layer, wherein the elastomer layer is made of butadiene rubber; the butadiene rubber is any one of nickel butadiene rubber, rare earth butadiene rubber and cobalt butadiene rubber, and a content of cis-form is greater than 80% to 100%. The vibrating diaphragm of the present disclosure can maintain excellent acoustic performance under extreme conditions of low temperature. (FIG.Type: ApplicationFiled: December 25, 2019Publication date: April 11, 2024Applicant: Goertek Inc.Inventors: WEIFENG PENG, Fengguang Ling, Chun Li, Chunla Liu
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Patent number: 11952278Abstract: The present invention belongs to the technical field of biomass carbon materials, and relates to a lignin porous carbon nanosheet, a preparation method therefor, and an application thereof in supercapacitor electrode materials. The method of the present invention performs layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin/oxalate composite, which is then carbonized and pickled to obtain the lignin porous carbon nanosheets. The lignin porous carbon nanosheets prepared by the above method of the present invention have a specific surface area of 200-1500 m2/g, a micropore specific surface area of 100-500 m2/g, a mesoporous specific surface area of 100-1000 m2/g, a pore diameter of 0.5-30 nm, and a pore volume of 0.5-1.5 cm3/g; they can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (with a specific capacitance retention rate of 76.Type: GrantFiled: October 23, 2019Date of Patent: April 9, 2024Assignee: South China University of TechnologyInventors: Xueqing Qiu, Dongjie Yang, Huan Wang, Zhiqiang Fang, Hongming Lou, Weifeng Liu, Zhixian Li, Jinhao Huang, Xinping Ouyang
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Publication number: 20240114291Abstract: Provided is a vibrating diaphragm of a sound-producing apparatus. The vibrating diaphragm includes at least one elastomer layer, wherein the elastomer layer is made from polysulfide rubber; the polysulfide rubber is any one of type A polysulfide rubber, type FA polysulfide rubber and type ST polysulfide rubber, and a molecular weight of the polysulfide rubber is 1000-500000.Type: ApplicationFiled: December 25, 2019Publication date: April 4, 2024Applicant: Goertek Inc.Inventors: WEIFENG PENG, Fengguang Ling, Chun Li, Chunfa Liu
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Patent number: 11928870Abstract: A method and apparatus used for extracting a feature point of an environmental target, which relate to the field of vehicles. The method comprises: acquiring the position of each corner point of an environmental target; and determining a feature point of the environmental target according to the position of each corner point of the environmental target. Thus, the problem wherein target identification is not precise may be solved, which is particularly suitable for the identification of a large target.Type: GrantFiled: September 27, 2019Date of Patent: March 12, 2024Assignee: GREAT WALL MOTOR COMPANY LIMITEDInventors: Hongliang Liu, Jianyong Ge, Longbao Zhen, Rutao Han, Wei Li, Junpeng Zhao, Ronglin Zeng, Chaokai Tian, Weifeng Deng
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Patent number: 11788160Abstract: The present disclosure provides a converter CO2—O2 mixed injection smelting method and a fire point area temperature dynamic control method. The method realizes online monitoring through an infrared temperature sensor installed inside an oxygen lance, dynamically adjusts the mixing ratio of CO2 and O2 and the height of the oxygen lance position according to the fire point area temperature changes and process requirements in different smelting stages, so that the secondary smelting system interlockingly and dynamically controls the fire point area temperature and the molten pool heating rate.Type: GrantFiled: January 21, 2020Date of Patent: October 17, 2023Assignee: University of Science and Technology BeijingInventors: Chao Feng, Rong Zhu, Guangsheng Wei, Baochen Han, Kai Dong, Xueliang Wang, Wenhe Wu, Shaoyan Hu, Weifeng Li, Juanjuan Jiang, Jianfeng Dong
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Publication number: 20230235853Abstract: A reinforced plastic air storage cylinder, including an upper shell comprising a first inner volume, a first inner wall defining the first inner volume, and a first outer frame comprising reinforcing ribs connected to an exterior surface of the first inner wall to provide structural support thereto, wherein the first inner wall comprises a plurality of arc segments connected together to form petal-like structures wherein the plurality of arc segments of the first inner wall forms a plurality of peaks projecting into the first inner volume at locations where adjacent arc segments of the plurality of arc segments of the first inner wall connect to one another; a first center column positioned in the first inner volume; a first set of tensile ribs; and a lower shell comprising a second inner volume.Type: ApplicationFiled: January 3, 2023Publication date: July 27, 2023Inventors: Xinyang Pu, Xiaohu Huang, Jun Xu, Xiankai Song, Weifeng Li, Chenghu Zhang
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Patent number: 11667982Abstract: A long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick belongs to the field of steelmaking technologies using powder-bottom-injecting converters. According to equipment characteristics, process characteristics, and erosion characteristics of the powder-bottom-injecting converter, the design, arrangement, installation, use, maintenance, and replacement of the bottom purging/powder injection bricks are systematically optimized and improved, a technology of automatically detecting the erosion height of bottom purging bricks is adopted, and hot replacement of bottom purging/powder injection bricks and hot replacement of the converter furnace bottom are used collaboratively, which not only can prolong the service life of a single bottom purging/powder injection brick, but also can greatly prolong the overall life of the powder-bottom-injecting converter from 1000-3000 heats in the prior art to 6000-10000 heats.Type: GrantFiled: September 16, 2021Date of Patent: June 6, 2023Assignees: University of Science and Technology Beijing, Soochow UniversityInventors: Rong Zhu, Shaoyan Hu, Kai Dong, Rongfang Su, Weifeng Li
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Publication number: 20220340986Abstract: The present disclosure provides a converter CO2—O2 mixed injection smelting method and a fire point area temperature dynamic control method. The method realizes online monitoring through an infrared temperature sensor installed inside an oxygen lance, dynamically adjusts the mixing ratio of CO2 and O2 and the height of the oxygen lance position according to the fire point area temperature changes and process requirements in different smelting stages, so that the secondary smelting system interlockingly and dynamically controls the fire point area temperature and the molten pool heating rate.Type: ApplicationFiled: January 21, 2020Publication date: October 27, 2022Inventors: Rong ZHU, Chao FENG, Guangsheng WEI, Baochen HAN, Kai DONG, Xueliang WANG, Wenhe WU, Shaoyan HU, Weifeng LI, Juanjuan JIANG, Jianfeng DONG
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Publication number: 20220325368Abstract: There is provided a method of dynamic control for a bottom blowing O2—CO2—CaO converter steelmaking process. In the process, O2 is adopted as a top blowing gas, a mixed gas O2+CO2 is adopted as a bottom blowing carrier gas to inject lime powders into the converter from a bottom blowing tuyere. The ingredients of the molten steel in the converter steelmaking process are predicted based on the conservation of matter, in combination with the ingredient data of charged molten iron, the ingredient data of the converter gas in the converter blowing process, and working conditions of the bottom blowing device. The top blowing oxygen amount, the bottom blowing gas ratio and the flow rate of lime powder are dynamically adjusted stage by stage according to requirements for target ingredients at the end point of blowing.Type: ApplicationFiled: August 11, 2020Publication date: October 13, 2022Inventors: Rong ZHU, Weifeng LI, Guangsheng WEI, Chao FENG, Kai DONG, Runzao LIU, Yun ZHOU, Qiang RUAN, Guoli WEI, Deyong WANG, Qingde ZHU, Zhiguo HAN
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Publication number: 20220235427Abstract: A long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick belongs to the field of steelmaking technologies using powder-bottom-injecting converters. According to equipment characteristics, process characteristics, and erosion characteristics of the powder-bottom-injecting converter, the design, arrangement, installation, use, maintenance, and replacement of the bottom purging/powder injection bricks are systematically optimized and improved, a technology of automatically detecting the erosion height of bottom purging bricks is adopted, and hot replacement of bottom purging/powder injection bricks and hot replacement of the converter furnace bottom are used collaboratively, which not only can prolong the service life of a single bottom purging/powder injection brick, but also can greatly prolong the overall life of the powder-bottom-injecting converter from 1000-3000 heats in the prior art to 6000-10000 heats.Type: ApplicationFiled: September 16, 2021Publication date: July 28, 2022Applicants: University of Science and Technology Beijing, Soochow UniversityInventors: Rong ZHU, Shaoyan HU, Kai DONG, Rongfang SU, Weifeng LI
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Publication number: 20210286256Abstract: The present disclosure provides a mask, a layout, a lithography system and a lithography process of the lithography system. The mask includes: a base which is transparent to exposure light; and a light-shielding film covering a part of a bottom surface of the base, wherein the light-shielding film forms a main pattern and an assistant pattern, the main pattern is light-shielding to the exposure light and is transferable, and the assistant pattern is light-shielding to the exposure light and is not transferable. The present disclosure can ensure a normal transfer of the main pattern, and reduce light transmittance of the mask.Type: ApplicationFiled: May 19, 2020Publication date: September 16, 2021Applicant: Shanghai Huahong Grace Semiconductor Manufacturing CorporationInventor: Weifeng LI
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Patent number: 11027405Abstract: An oscillating power tool, including: a housing; an output shaft for installing a working head, the output shaft being installed in the housing and extending out of the housing; a transmission mechanism, installed in the housing, and the transmission mechanism being connected to the output shaft; and a motor, installed in the housing, the motor being connected to the transmission mechanism and driving the transmission mechanism to drive the output shaft to move, where an outer diameter of the motor is in a range of 40 mm to 50 mm.Type: GrantFiled: November 30, 2018Date of Patent: June 8, 2021Assignee: Positec Power Tools (Suzhou) Co., Ltd.Inventors: Shisong Zhang, Xiaoli Pang, Hongfeng Zhong, Yu Wu, Weifeng Li, Xiao Zhao, Zhongya Zhou, Hongbing Wu, Haiquan Wu, Yinhang Bian, Hui Lu, Hui Li, Wei Zhang
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Patent number: 10988818Abstract: An efficient long-service-life blowing method include the steps of introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor; obtaining first-purity CO2—N2 mixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO2—N2 mixed gas through the decarburization converter flue gas; obtaining O2—CO2—N2 mixed gas through the decarburization converter flue gas; obtaining first-purity CO2 gas through the second-purity CO2—N2 mixed gas; and using the first-purity CO2—N2 mixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO2—N2 mixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O2—CO2—N2 mixed gas and the first-purity CO2 gas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter.Type: GrantFiled: July 10, 2020Date of Patent: April 27, 2021Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJINGInventors: Rong Zhu, Shaoyan Hu, Kai Dong, Guangsheng Wei, Haoran Ma, Weifeng Li, Yun Zhou, Zhihui Li, Wenhe Wu, Baochen Han, Chao Feng, Rongfang Su
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Patent number: 10982242Abstract: The present invention relates to an optimized fermentation process of coenzyme Q10, particularly to a fermentation process of coenzyme Q10 via flow feeding based on cooperative control of changes of online oxygen consumption rate and conductivity. During the fermentation process of coenzyme Q10 production strains, the oxygen consumption rate is controlled between 30-150 mmol/L·h and the conductivity is maintained between 3.0-30.0 ms/cm via flow feeding, so as to facilitate strain growth and the start of coenzyme Q10 synthesis and accumulation. The present invention can substantially increase output of coenzyme Q10 and greatly reduce the production cost with simple process control and strong operability, thus being applicable to large-scale industrial production.Type: GrantFiled: October 21, 2016Date of Patent: April 20, 2021Assignees: SHANGYU NHU BIOLOGICAL CHEMICAL CO., LTD., ZHEJIANG UNIVERSITY, ZHEJIANG NHU COMPANY LTD.Inventors: Hongwei Yu, Yong Lv, Yong Li, Jianbo Chen, Shaofeng Chen, Weifeng Li, Hongmei Zhang, Yongqiang Zhu
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Patent number: D978653Type: GrantFiled: August 20, 2021Date of Patent: February 21, 2023Assignee: Keurig Green Mountain, Inc.Inventors: Weifeng Li, Mario Liuzza, Poa Xuan Yeap
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Patent number: D992947Type: GrantFiled: August 20, 2021Date of Patent: July 25, 2023Assignee: Keurig Green Mountain, Inc.Inventors: Poa Xuan Yeap, Fa Yong Zhong, Chun Ki Jason Ha, Weifeng Li, John Couture, Chang Geng
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Patent number: D1003376Type: GrantFiled: June 29, 2023Date of Patent: October 31, 2023Assignee: Shenzhen Lemeishi Technology Co., Ltd.Inventor: Weifeng Li