Patents by Inventor John S. Cheng-Shiang

John S. Cheng-Shiang 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).

  • Foams of linear low density polyethylene and a method for their preparation
    Patent number: 4738810
    Abstract: Foams are prepared from a linear low density polyethylene and, optionally, other olefinic polymers, such as a low density polyethylene using a chemical cross-linking agent. The resulting cross-linked polyethylene foams exhibit an excellent balance of properties at generally lower densities than foams prepared from low density polyethylene only.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: April 19, 1988
    Assignee: The Dow Chemical Company
    Inventor: John S. Cheng-Shiang
  • Method for the preparation of cross-linked polyethylene foams and foams produced by the method
    Patent number: 4721591
    Abstract: A foam of cross-linked polyethylene having microcell structure is prepared using a chemical cross-linking initiator having a 10 hours half life temperature of from 80.degree. to 110.degree. C. In a preferred embodiment, the chemical cross-linking agent is employed in combination with co-cross-linking agent such as triallyl cyanurate.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: January 26, 1988
    Assignee: Dow Chemical Iberica S.A.
    Inventor: John S. Cheng-Shiang