Patents by Inventor Liu Rongsheng

Liu Rongsheng 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).

  • Crosslinkable polymer composition and cable with advantageous electrical properties
    Patent number: 11390699
    Abstract: A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol —O—O— per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: July 19, 2022
    Assignee: Borealis AG
    Inventors: Annika Smedberg, Birgitta Kallstrand, Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Gustavo Dominguez, Carl-Olof Olsson, Liu Rongsheng, Marc Jeroense
  • Crosslinkable polymer composition and cable with advantageous electrical properties
    Patent number: 11078312
    Abstract: A cross-linked polymer composition includes a cross-linked polyolefin. Peroxide in an amount of less than 35 mmol —O—O—/kg polymer composition may be included in the polymer composition prior to crosslinking the polyolefin. Suitable polyolefins that can be cross-linked in the polymer composition include an unsaturated LDPE homopolymer and an unsaturated LDPE copolymer of ethylene with one or more comonomers. Such unsaturated LDPE polymer can contain vinyl groups, and the total amount of vinyl groups present in the unsaturated LDPE can be higher than 0.05/1000 carbon atoms. The cross-linked polymer composition can be used, for example, in producing a cross-linkable and cross-linked article such as a cross-linkable and cross-linked direct current (DC) or other type of power cable.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: August 3, 2021
    Assignee: BOREALIS AG
    Inventors: Annika Smedberg, Birgitta Kallstrand, Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Gustavo Dominguez, Carl-Olof Olsson, Liu Rongsheng, Marc Jeroense
  • CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES
    Publication number: 20200115477
    Abstract: A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol —O—O— per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition.
    Type: Application
    Filed: December 13, 2019
    Publication date: April 16, 2020
    Inventors: Annika SMEDBERG, Birgitta KALLSTRAND, Ulf NILSSON, Per-Ola HAGSTRAND, Villgot ENGLUND, Gustavo DOMINGUEZ, Carl-Olof OLSSON, Liu RONGSHENG, Marc JEROENSE
  • CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES
    Publication number: 20130199817
    Abstract: The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition.
    Type: Application
    Filed: March 1, 2011
    Publication date: August 8, 2013
    Applicant: Borealis AG
    Inventors: Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Liu Rongsheng
  • CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES
    Publication number: 20130000947
    Abstract: A polymer composition with improved DC electrical properties and a cable surrounded by at least one layer comprising the polymer composition are provided.
    Type: Application
    Filed: November 3, 2010
    Publication date: January 3, 2013
    Applicant: BOREALIS AG
    Inventors: Annika Smedberg, Birgitta Kallstrand, Ulf Nilsson, Per-Ola Hagstrand, Villgot Englund, Gustavo Dominguez, Carl-Olof Olsson, Liu Rongsheng, Marc Jeroense
  • Line section of a gas-insulated line
    Patent number: 6002084
    Abstract: The line section of a gas-insulated line contains a high-voltage electric conductor and a pressure pipe which is made from a thermoplastic material and filled with insulating gas. The pressure pipe holds the electric conductor on insulated supports. The pressure pipe has two pipes which are welded to one another on the end faces thereof, the end section being respectively widened to flare outwardly in the radial direction with the welding of the two pipes.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: December 14, 1999
    Assignee: Asea Brown Boveri AG
    Inventors: Mats Leijon, Li Ming, Liu Rongsheng, Dan Windmar, Bertil Moritz