Patents by Inventor Wei Cen

Wei Cen 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).

  • Patent number: 11840508
    Abstract: A catalyst system for olefin polymerization contains a main catalyst and a cocatalyst. The cocatalyst contains a twelve-membered ring compound represented by formula (M). The catalyst system is suitable for preparing polypropylene products having high stereoregularity and low ash, and can regulate the melt index of the products within a wide range by adjusting the amount of hydrogenation. It is also suitable for copolymerization systems to improve the copolymerization yield.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: December 12, 2023
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
    Inventors: Jie Lin, Xiaofan Zhang, Ting Huang, Junhui Zhang, Junling Zhou, Zhufang Sun, Xianzhi Xia, Hui Zhao, Zifang Guo, Jin Zhao, Haitao Liu, Meiyan Fu, Jigui Zhang, Lin Qi, Lian Yan, Wei Cen, Yu Wang
  • Publication number: 20230391902
    Abstract: A magnesium-based solid, by means of determination based on a nitrogen adsorption method, has a multimodal pore distribution and a specific surface area of not less than 50 m2/g, and the pore size distribution of the solid is in a range of 1 nm to 300 nm. There is at least one peak within a pore size range of less than 10 nm, and there is at least another peak within a pore size range of not less than 10 nm. A catalyst is formed using the solid catalyst component is used for propylene polymerization.
    Type: Application
    Filed: October 15, 2021
    Publication date: December 7, 2023
    Inventors: Wei CEN, Junling ZHOU, Meiyan FU, Lian YAN, Zhan SHI, Xiaofan ZHANG, Xianzhi XIA, Zhengyang GUO, Jigui ZHANG, Jie LIN, Lin QI, Tianyi ZHANG, Junhui ZHANG, Hui ZHAO, Yu WANG, Ying WANG
  • Publication number: 20220251016
    Abstract: A catalyst system for olefin polymerization contains a main catalyst and a cocatalyst. The cocatalyst contains a twelve-membered ring compound represented by formula (M). The catalyst system is suitable for preparing polypropylene products having high stereoregularity and low ash, and can regulate the melt index of the products within a wide range by adjusting the amount of hydrogenation. It is also suitable for copolymerization systems to improve the copolymerization yield.
    Type: Application
    Filed: July 24, 2020
    Publication date: August 11, 2022
    Inventors: Jie LIN, Xiaofan ZHANG, Ting HUANG, Junhui ZHANG, Junling ZHOU, Zhufang SUN, Xianzhi XIA, Hui ZHAO, Zifang GUO, Jin ZHAO, Haitao LIU, Meiyan FU, Jigui ZHANG, Lin QI, Lian YAN, Wei CEN, Yu WANG
  • Patent number: 6287577
    Abstract: The present invention relates to a leave-on antimicrobial composition comprising from about 0.001% to about 5% of an antimicrobial active; from about 0.05% to about 10% of an anionic surfactant; from about 0.1% to about 10% of a proton donating agent; and from about 0% to about 99.85% of water; wherein the composition is adjusted to a pH of from about 3.0 to about 6.0; wherein the leave-on antimicrobial composition has a Gram Positive Residual Effectiveness Index of greater than about 0.5; and wherein the leave-on antimicrobial composition has a Mildness Index of greater than 0.3. The invention also encompasses methods for cleansing skin and providing residual effectiveness versus Gram positive bacteria using these products.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 11, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Theresa Anne Bakken, Wei Cen, Mannie Lee Clapp, Raphael Warren
  • Patent number: 6284259
    Abstract: The present invention relates to an antimicrobial wipe comprising a porous or absorbent sheet impregnated with an antimicrobial cleansing composition, wherein the antimicrobial cleansing composition comprises from about 0.001% to about 5.0%, by weight of the antimicrobial cleansing composition, of an antimicrobial active; from about 0.05% to about 10%, by weight of the antimicrobial cleansing composition, of an anionic surfactant; from about 0.1% to about 10%, by weight of the antimicrobial cleansing composition, of a proton donating agent; and from about 3% to about 99.85%, by weight of the antimicrobial cleansing composition, water; wherein the composition is adjusted to a pH of from about 3.0 to about 6.0; wherein the antimicrobial cleansing composition has a Gram Positive Residual Effectiveness Index of greater than about 0.5; and wherein the antimicrobial cleansing composition has a Mildness Index of less than about 0.3.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 4, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Theresa Anne Bakken, Wei Cen, Mannie Lee Clapp, Raphael Warren
  • Patent number: 6197315
    Abstract: The present invention relates to an antimicrobial wipe comprising a porous or absorbent sheet impregnated with an antimicrobial cleansing composition, wherein the antimicrobial cleansing composition comprises from about 0.001% to about 5.0%, by weight of the antimicrobial cleansing composition, of an antimicrobial active; from about 0.05% to about 10%, by weight of the antimicrobial cleansing composition, of an anionic surfactant; from about 0.1% to about 10%, by weight of the antimicrobial cleansing composition, of a proton donating agent; and from about 3% to about 99.85%, by weight of the antimicrobial cleansing composition, water; wherein the composition is adjusted to a pH of from about 3.0 to about 6.0; wherein the antimicrobial cleansing composition has a Gram Negative Residual Effectiveness Index of greater than about 0.3. The invention also relates to these antibacterial wipes wherein the antimicrobial cleansing composition has a Mildness Index of greater than about 0.3.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: March 6, 2001
    Assignee: Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Wei Cen, Theresa Anne Bakken
  • Patent number: 6190675
    Abstract: The present invention relates to a rinse-off antimicrobial cleansing composition comprising from about 0.001% to about 5% of an antimicrobial active, from about 1% to about 80% of an anionic surfactant, from about 0.1% to about 12% of a proton donating agent; and from about 3% to about 98.899% of water, wherein the composition is adjusted to a pH of from about 3.0 to about 6.0, wherein the rinse-off antimicrobial cleansing composition has a Gram Positive Residual Effectiveness Index of greater than about 1.8, and wherein the rinse-off antimicrobial cleansing composition has a Mildness Index of greater than 0.3. The invention also encompasses methods for cleansing skin and providing residual effectiveness versus Gram positive bacteria using these products.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: February 20, 2001
    Assignee: Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Wei Cen, Theresa Anne Bakken, Mannie Lee Clapp, Raphael Warren
  • Patent number: 6183757
    Abstract: The present invention relates to a rinse-off antimicrobial cleansing composition effective against Gram positive bacteria, Gram negative bacteria, fungi, yeasts. molds and viruses comprising from about 0.001% to about 5% of an antimicrobial active; from about 1% to about 80% of an anionic surfactant; from about 0.1% to about 12% of a proton donating agent; and from about 3% to about 98.899% of water; wherein the composition is adjusted to a pH of from about 3.0 to about 6.0; wherein the rinse-off antimicrobial cleansing composition has an One-wash Immediate Germ Reduction Index of greater than about 2.5. The invention also encompasses methods for reducing the number of germs from the skin using these products.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: February 6, 2001
    Assignee: Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Wei Cen, Theresa Anne Bakken
  • Patent number: 6183763
    Abstract: The present invention relates to an antimicrobial wipe effective against Gram positive bacteria, Gram negative bacteria, fungi, yeasts, molds, and viruses comprising a porous or absorbent sheet impregnated with an antimicrobial cleansing composition, wherein the antimicrobial cleansing composition comprises from about 0.001% to about 5.0%, by weight of the antimicrobial cleansing composition, of an antimicrobial active; from about 0.05% to about 10%, by weight of the antimicrobial cleansing composition, of an anionic surfactant; from about 0.1% to about 10%, by weight of the antimicrobial cleansing composition, of a proton donating agent; and from about 3% to about 99.85%, by weight of the antimicrobial cleansing composition, water; wherein the composition is adjusted to a pH of from about 3.0 to about 6.0; wherein the antimicrobial cleansing composition an One-wash Immediate Germ Reduction Index of greater than about 1.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: February 6, 2001
    Assignee: Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Wei Cen, Theresa Anne Bakken
  • Patent number: 5968539
    Abstract: The present invention relates to a rinse-off antimicrobial cleansing composition comprising from about 0.001% to about 5% of an antimicrobial active, from about 1% to about 80% of an anionic surfactant, from about 0.1% to about 12% of a proton donating agent; and from about 3% to about 98.899% of water, wherein the composition is adjusted to a pH of from about 3.0 to about 6.0, wherein the rinse-off antimicrobial cleansing composition has a Gram Negative Residual Effectiveness Index of greater than about 0.3, and wherein the rinse-off antimicrobial cleansing composition has a Mildness Index of greater than 0.3. The invention also encompasses methods for cleansing skin and providing residual effectiveness versus Gram negative bacteria using these products.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: October 19, 1999
    Assignee: Procter & Gamble Company
    Inventors: Peter William Beerse, Jeffrey Michael Morgan, Kathleen Grieshop Baier, Wei Cen, Theresa Anne Bakken