Patents by Inventor Guofu Zhang

Guofu Zhang 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: 20240087804
    Abstract: A transformer comprises a winding structure which forms a primary side coil, a secondary side coil and first and second wires wound into the coil structure of the transformer. The first wire and second wire define a capacitance between them. The first wire is coupled to a cold point in the primary side and the second wire is coupled to a cold point in the secondary side, thereby this capacitance forming a Y-capacitor between the primary and the secondary sides. This capacitance may for example be used for EMI suppression.
    Type: Application
    Filed: December 24, 2021
    Publication date: March 14, 2024
    Inventors: HUI ZHANG, ZHIAN XIONG, GUOFU HU
  • Patent number: 11512006
    Abstract: A method for simultaneously preparing an iron oxide red pigment and an aromatic amine is provided. In the method, an aromatic nitro compound and ferrous iron are first used to prepare an iron oxide red seed crystal under the action of a catalyst, and then iron powder is used to reduce the aromatic nitro compound and generate iron oxide in situ which grows into iron oxide red with pigment performance on the seed crystal. The method provides a clean and economical way for the reduction of an aromatic nitro compound (especially those in which there are other easily-reduced substituents on an aromatic ring) to prepare an aromatic amine.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: November 29, 2022
    Assignee: HEBEI CAIKE CHEMICAL CO., LTD.
    Inventors: Weidong Duan, Guofu Zhang, Yu Wei
  • Publication number: 20220177323
    Abstract: A method for simultaneously preparing an iron oxide red pigment and an aromatic amine is provided. In the method, an aromatic nitro compound and ferrous iron are first used to prepare an iron oxide red seed crystal under the action of a catalyst, and then iron powder is used to reduce the aromatic nitro compound and generate iron oxide in situ which grows into iron oxide red with pigment performance on the seed crystal. The method provides a clean and economical way for the reduction of an aromatic nitro compound (especially those in which there are other easily-reduced substituents on an aromatic ring) to prepare an aromatic amine.
    Type: Application
    Filed: November 20, 2020
    Publication date: June 9, 2022
    Applicant: HEBEI CAIKE CHEMICAL CO., LTD.
    Inventors: Weidong DUAN, Guofu ZHANG, Yu WEI
  • Publication number: 20210006087
    Abstract: A charging method includes obtaining a working state of a present power adapter connected to a charger through a physical interface, in response to the working state of the present power adapter being an overcurrent protection state, continuing to supply power to a charging control circuit of the charger through a backup power of the charger, and reducing, via the charging control circuit, a present current output by the charger until the working state of the present power adapter returns to normal.
    Type: Application
    Filed: September 18, 2020
    Publication date: January 7, 2021
    Inventors: Jie TIAN, Guofu ZHANG, Wentao WANG
  • Publication number: 20190227494
    Abstract: The Invention relates to the technical field of watches, and in particular, to a screw-bezel interchangeable watch, comprising a watch case, a watch mechanical rotational apparatus, and an energy-supply knob. A watch bezel and the watch case are tightly threaded and movably connected. An upper end surface of the watch case has a circular structure. A transparent lens with a smaller diameter is provided in the middle of circular structure. An annular decorative ring is disposed on an outer side of the transparent lens, several decorative rings are disposed, and the decorative rings have different decorative effects.
    Type: Application
    Filed: April 12, 2018
    Publication date: July 25, 2019
    Inventor: Guofu ZHANG
  • Publication number: 20180056348
    Abstract: This invention provides a method for producing a polishing bar made of valve steel 53Cr21Mn9Ni4N. The process flow is as below: electric furnace smelting?outside-the-furnace refining?continuous casting?heating?high-speed wire rolling?heat treatment (off-line/online)?straightening?polishing?inspection?storage. The production method of the invention adopts a casting method of continuous casting to overcome the poor high-temperature plasticity and the great deformation resistance of 53Cr21Mn9Ni4N which leads to a difficulty in continuous casting. The continuous casting is directly carried out on casting billets for rolling, which greatly reduces the material loss and energy consumption of this step, and improves the yield of the billets. The high-speed wire precision rolling technology is directly used on the continuous casting billets to improve the production efficiency, and greatly improve the size precision control of rolled and finished wire rods.
    Type: Application
    Filed: August 22, 2017
    Publication date: March 1, 2018
    Applicant: Jiangsu SHENYUAN Special Steel Co.,Ltd.
    Inventors: Guofu ZHANG, Yuguo TU, Dejian ZHAI, Hongsheng KE, Guoping SHEN, Weibin XUE
  • Patent number: 9115154
    Abstract: The present disclosure discloses a method of preparing tris-(2-chloroethyl)phosphite, comprising: continuously pumping phosphorus trichloride and ethylene oxide into a tubular pre-mixer for pre-mixing, respectively, and starting a refrigerant cooling unit of the microchannel reaction device simultaneously, to obtain a product tris-(2-chloroethyl)phosphite after complete reaction. The method according to the present disclosure not only significantly improves the content of the esterification product, thus increasing the production efficiency by 10 to 100 times than that of an ordinary tank reactor, but also reduces the residence time of the esterification product in the reactor from 110 hours to several minutes.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: August 25, 2015
    Assignee: SHAOXING EASTLAKE BIOCHEMICAL CO., LTD.
    Inventors: Guoyan Ji, Chengrong Ding, Guofu Zhang, Sheng Ji, Guoyao Ji, Xiaoying Ji, Huadong Yang
  • Patent number: 8512224
    Abstract: A reduced dose inseminate and method for producing and using such reduced dose inseminate to fertilize the eggs of a female animal by artificial insemination with fewer sperm cells than compared with conventional dose inseminates.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: August 20, 2013
    Assignee: XY, LLC
    Inventors: Xihe Li, Wenzhong Zhou, Guofu Zhang, Songjin Qian, Jianguo Wang
  • Patent number: 8251887
    Abstract: Artificial insemination of female animals and in vitro fertilization of oocytes with fresh or frozen-thawed semen have been applied to the reproduction of animals. According to the traditional theory and conventional procedures, a great number of sperm cells are needed to ensure a successful fertilization.
    Type: Grant
    Filed: January 24, 2009
    Date of Patent: August 28, 2012
    Inventors: Xihe Li, Wenzhong Zhou, Guofu Zhang, Songjin Qian, Jiangguo Wang
  • Publication number: 20100191041
    Abstract: Artificial insemination of female animals and in vitro fertilization of oocytes with fresh or frozen-thawed semen have been applied to the reproduction of animals. According to the traditional theory and conventional procedures, a great number of sperm cells are needed to ensure a successful fertilization.
    Type: Application
    Filed: January 24, 2009
    Publication date: July 29, 2010
    Inventors: Xihe Li, Wenzhong Zhou, Guofu Zhang, Songjin Qian, Jiangguo Wang
  • Publication number: 20100191042
    Abstract: A reduced dose inseminate and method for producing and using such reduced dose inseminate to fertilize the eggs of a female animal by artificial insemination with fewer sperm cells than compared with conventional dose inseminates.
    Type: Application
    Filed: October 15, 2009
    Publication date: July 29, 2010
    Inventors: Xhihe Li, Wenzhong Zhou, Guofu Zhang, Songjin Qian, Jianguo Wang