Patents by Inventor Zhimin Wu

Zhimin Wu 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: 20210050150
    Abstract: Disclosed is a sintered body, a sintered permanent magnet and preparation methods. The sintered body comprises Nd2Fe14B crystal phase as a primary phase and a rare earth rich phase as a grain boundary phase and has a composition expressed by composition formula RaBbGacCudAleMfCogFebalance; R is one or more selected from rare earth elements, and R must comprise Nd; M is one or more selected from the group consisting of Zr, Ti, and Nb; a satisfies 13%?a?15.3%; b satisfies 5.4%?b?5.8%; c satisfies 0.05%?c?0.25%; d satisfies 0.08%?d?0.3%; e satisfies 0?e?1.2%; f satisfies 0.08%?f?0.2%; g satisfies 0.8%?g?2.5%; grains in Nd2Fe14B crystal phase have average size L of 4-8 ?m, grain boundary phases have average thickness t with unit of ?m; the relation of t and L is: ?=t/L; and ? is defined as 0.009???0.012. The present disclosure improves diffusion efficiency of heavy rare earth elements RH.
    Type: Application
    Filed: March 17, 2020
    Publication date: February 18, 2021
    Applicant: Baotou Tianhe Magnetics Technology Co., Ltd.
    Inventors: Suo Bai, Shujie Wu, Yi Dong, Zhimin Wu, Shuai Zhang, Bo Yuan, Yi Yuan, Ya Chen, Wenjie Yuan
  • Publication number: 20200316516
    Abstract: The invention relates to a process and apparatus for separation of gas mixtures with reduced maintenance costs. The process and the apparatus consist of a feed stream separation stage (1), and a retentate separation stage (2), of which both are membrance separation stages, wherein the first retentate stream (7) is heated to temperature higher than the temperature of the feed stream (5), before it is introduced to the retentate separation stage (2), and the total capacity of the membranes used in the retentate separation stage (2) is higher than the total capacity of the membranes used in the feed stream stage (1).
    Type: Application
    Filed: May 31, 2017
    Publication date: October 8, 2020
    Applicant: Evonik Specialty Chemicals (Shanghai) Co.,Ltd.
    Inventors: Zhimin WU, Xiaojue CHEN, Ricardo WILLEMANN
  • Publication number: 20200243233
    Abstract: The present invention provides a samarium-cobalt magnet and a method for preparing the same. The method comprises mixing an alloy powder with a zirconium powder in an amount of 0.1-0.35 wt % of the weight of the alloy powder to form a mixture. The alloy powder is formed from 10.5-13.5 wt % of samarium, 12.5-15.5 wt % gadolinium, 50-55 wt % of cobalt, 13-17 wt % of iron, 4-10 wt % of copper, and 2-7 wt % of zirconium. The method brings about at low costs a samarium-cobalt magnet having a positive temperature coefficient of remanence.
    Type: Application
    Filed: January 15, 2020
    Publication date: July 30, 2020
    Applicant: Baotou Tianhe Magnetics Technology Co., Ltd.
    Inventors: Bingjun Zhang, Yi Dong, Zhimin Wu, Shulin Diao, Xin Liu, Jianyun Su, Yuelin Fan, Bo Yuan, Yi Yuan, Ya Chen, Wenjie Yuan
  • Publication number: 20150171245
    Abstract: A flip-chip solar cell chip includes a bonding transfer substrate; a metal bonding layer; a flip-chip solar cell epitaxial layer that bonds with the bonding transfer substrate with the metal bonding layer; the flip-chip solar cell epitaxial layer and the metal bonding layer are divided into two or more portions; the surface of the flip-chip solar cell epitaxial layer has a front electrode; and the metal bonding layer is connected with the ends of the front electrode to form a series connection of the divided epitaxial layer. Advantageously, the division of the solar cell epitaxial layer into a plurality of completely-separated portions greatly reduces photo currents and power loss of cell chip series resistance while realizing multiplied increase of output voltage, thereby improving photoelectric conversion efficiency. The use of metal bonding layer as the back electrode realizes extremely low resistance loss of the back electrode.
    Type: Application
    Filed: February 27, 2015
    Publication date: June 18, 2015
    Applicant: XIAMEN SANAN OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: WEIPING XIONG, GUIJIANG LIN, ZHIMIN WU, MINGHUI SONG, HUI AN
  • Patent number: 9006562
    Abstract: A high-concentration solar cell includes an epitaxial layer structure, an upper patterned electrode on the top surface, and a back electrode on the back surface. The upper patterned electrode includes a primary pattern and a secondary pattern, where the primary pattern is composed of a series of small metal isosceles trapezoids around the perimeter of the cell. The narrower base of each metal trapezoid points toward an interior of the cell. A lead soldering pad is located within each metal trapezoid for being soldered to an external conductor for carrying the solar cell current. The secondary pattern consists of thin spaced conductors that connect to the angled sides and base of each trapezoid and spread current across the top surface of the cell. The current along the angled sides of each trapezoid is well-distributed to all the spaced conductors connected to the angled sides to avoid current crowding.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: April 14, 2015
    Inventors: Weiping Xiong, Guijiang Lin, Minghui Song, Zhimin Wu, Zhaoxuan Liang, Zhidong Lin
  • Publication number: 20140102534
    Abstract: A high-concentration solar cell includes an epitaxial layer structure, an upper patterned electrode on the top surface, and a back electrode on the back surface. The upper patterned electrode includes a primary pattern and a secondary pattern, where the primary pattern is composed of a series of small metal isosceles trapezoids around the perimeter of the cell. The narrower base of each metal trapezoid points toward an interior of the cell. A lead soldering pad is located within each metal trapezoid for being soldered to an external conductor for carrying the solar cell current. The secondary pattern consists of thin spaced conductors that connect to the angled sides and base of each trapezoid and spread current across the top surface of the cell. The current along the angled sides of each trapezoid is well-distributed to all the spaced conductors connected to the angled sides to avoid current crowding.
    Type: Application
    Filed: May 7, 2012
    Publication date: April 17, 2014
    Applicant: Xiamen Sanan Optoelectronics Technology Co., Ltd.
    Inventors: Weiping Xiong, Guijiang Lin, Minghui Song, Zhimin Wu, Zhaoxuan Liang, Zhidong Lin
  • Patent number: 6129087
    Abstract: A smoking article includes at least one strip of heat conducting material extending from one end of the tobacco rod of a smoking article to the opposite end of the tobacco rod. Preferably, the strip of material is at the interface between the tobacco rod and the cigarette paper and extends substantially from the lighting end of the tobacco column to at or near the attachment of a filter to the tobacco column.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: October 10, 2000
    Assignee: Brown & Williamson Tobacco Corporation
    Inventors: Gary W. Wallace, Zhimin Wu