Patents by Inventor Joyce Lai-Ching Chau

Joyce Lai-Ching Chau 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 to estimate pent values
    Patent number: 7816488
    Abstract: The PENT value for a resin may be estimated within ±10% by determining the % of heat flow to melt a fraction of a polymer above or below a set point and comparing it to a graph or algorithm of PENT values related to the % of heat flow to melt entire sample for a number of resins made using the same catalyst system. In a similar manner one may estimate the process conditions to prepare a polymer having a target PENT value based on the conditions used to prepare the samples for the graph or algorithms. The invention provides a simple procedure that may be used at a manufacturing site to estimate PENT values.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: October 19, 2010
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Joo Wooi Teh, Joyce Lai-Ching Chau, Victoria Ker, Gary Yim
  • Method to estimate pent values
    Publication number: 20080276717
    Abstract: The PENT value for a resin may be estimated within ±10% by determining the % of heat flow to melt a fraction of a polymer above or below a set point and comparing it to a graph or algorithm of PENT values related to the % of heat flow to melt entire sample for a number of resins made using the same catalyst system. In a similar manner one may estimate the process conditions to prepare a polymer having a target PENT value based on the conditions used to prepare the samples for the graph or algorithms. The invention provides a simple procedure that may be used at a manufacturing site to estimate PENT values.
    Type: Application
    Filed: April 29, 2008
    Publication date: November 13, 2008
    Inventors: Joo Wooi Teh, Joyce Lai-Ching Chau, Victoria Ker, Gary Yim