Patents by Inventor Weng Shing Lin

Weng Shing Lin 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).

  • Ethylene vinyl alcohol copolymer pellet, method for extrusion of the pellet and extrusion molded film produced thereby
    Patent number: 10717796
    Abstract: Extruded films comprising ethylene vinyl alcohol copolymer (EVOH) with substantially no blow holes therein, are formed by using a pellet feed to the extruder wherein 90-100 wt. % of the pellets pass through an ASTM size 5 sieve and 0-10 wt. % of the pellets are finer than a number 10 mesh (ASTM Sieve size). Uniform feeding to and through the extruder with a lack of bridging of the EVOH pellet feed have been observed.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: July 21, 2020
    Assignee: CHANG CHUN PETROCHEMICAL CO., LTD.
    Inventors: Huan Ming Chang, Weng Shing Lin, Chih Chieh Liang, Chia Hao Hsu
  • ETHYLENE VINYL ALCOHOL COPOLYMER PELLET, METHOD FOR EXTRUSION OF THE PELLET AND EXTRUSION MOLDED FILM PRODUCED THEREBY
    Publication number: 20200010591
    Abstract: Extruded films comprising ethylene vinyl alcohol copolymer (EVOH) with substantially no blow holes therein, are formed by using a pellet feed to the extruder wherein 90-100 wt. % of the pellets pass through an ASTM size 5 sieve and 0-10 wt. % of the pellets are finer than a number 10 mesh (ASTM Sieve size). Uniform feeding to and through the extruder with a lack of bridging of the EVOH pellet feed have been observed.
    Type: Application
    Filed: July 6, 2018
    Publication date: January 9, 2020
    Applicant: CHANG CHUN PETROCHEMICAL CO., LTD.
    Inventors: Huan Ming Chang, Weng Shing Lin, Chih Chieh Liang, Chia Hao Hsu
  • Method for improved the handling heat-resistance of the ethylene-vinyl alcohol copolymer
    Patent number: 7186775
    Abstract: The present invention relates to a method for increasing the heat-resistant of ethylene-vinyl alcohol copolymer (EVOH), the method is characterized by using a mixture of acetic acid, magnesium dihydrogen phosphate, and potassium dihydrogen phosphate at a certain ratio as an acid-treating solution in the acid-treating procedure of a process for preparing EVOH. The EVOH produced by the method of the present invention exhibits an excellent heat-resistance and does not become yellowing attributed to the elevated processing temperature. Also, the EVOH generated by the method of the present invention exhibits a uniform heat-resistance since the additives are dispersed evenly in the EVOH.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: March 6, 2007
    Assignee: Chang Chun Petrochemical Co., Ltd.
    Inventors: Jing Jin Tsai, Li Shing Lin, Huan Ming Chang, Kuang Hui Fan, Weng Shing Lin