Patents by Inventor Chul Won Choi

Chul Won Choi 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).

  • METHOD AND SYSTEM FOR DETERMINING COMPLEX SITUATION ACCORDING TO TIME FLOW OF EVENTS OCCURRING IN EACH DEVICE
    Publication number: 20180039839
    Abstract: Provided is a method and system for determining a complex situation according to the time flow of events occurring in each device. In a method for determining a complex situation according to an embodiment of the present invention, a current situation is determined by detecting events occurring in devices and referring to a complex situation determination rule. The complex situation determination rule is a rule in which the current situation is mapped according to the events, which have occurred in the devices, and time intervals between the events. The present invention enables a more reliable determination of the current situation by complexly considering not only the events occurring in the devices but also time intervals between the events.
    Type: Application
    Filed: March 11, 2016
    Publication date: February 8, 2018
    Applicant: SK HOLDINGS CO., LTD.
    Inventors: Chul Won CHOI, Woo Yeong JANG
  • Glass/polyvinylbutyral laminates having directional surface patterns and a process for preparing same
    Patent number: 8025826
    Abstract: De-airing of PVB/glass laminates can be improved, while haze in the pre-press is minimized and sleep time reduced as a result using a PVB sheet having a roughened surface with directionality. A roughened surface with a washboard pattern that is useful in this regard can be obtained by varying certain conditions of a melt-fracture extrusion process.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: September 27, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Chul Won Choi, Sang Gyu Lee
  • GLASS/POLYVINYLBUTYRAL LAMINATES HAVING DIRECTIONAL SURFACE PATTERNS AND A PROCESS FOR PREPARING SAME
    Publication number: 20090277573
    Abstract: De-airing of PVB/glass laminates can be improved, while haze in the pre-press is minimized and sleep time reduced as a result using a PVB sheet having a roughened surface with directionality. A roughened surface with a washboard pattern that is useful in this regard can be obtained by varying certain conditions of a melt-fracture extrusion process.
    Type: Application
    Filed: July 22, 2009
    Publication date: November 12, 2009
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Chul Won Choi, Sang Gyu Lee
  • Glass/polyvinylbutyral laminates having directional surface patterns and a process for preparing same
    Publication number: 20030012964
    Abstract: De-airing of PVB/glass laminates can be improved, while haze in the pre-press is minimized and sleep time reduced as a result using a PVB sheet having a roughened surface with directionality. A roughened surface with a washboard pattern that is useful in this regard can be obtained by varying certain conditions of a melt-fracture extrusion process.
    Type: Application
    Filed: August 14, 2002
    Publication date: January 16, 2003
    Inventors: Chul Won Choi, Sang Gyu Lee