Patents by Inventor Jiwen F. Duan

Jiwen F. Duan 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).

  • Catalyst composition and process therewith
    Publication number: 20020098972
    Abstract: A composition that can be used as a catalyst is disclosed. The composition comprises, or is produced by combining, a titanium compound, a glycol, a phosphorus compound, and optionally water. Also disclosed is a process that can be used for producing a polyester. The process comprises contacting, in the presence of a catalyst composition, a carbonyl compound and an alcohol under a condition suitable for esterification, transesterification, or polymerization. The catalyst composition comprises, or is produced by combining, a titanium compound, a glycol, a phosphorus compound, and optionally water.
    Type: Application
    Filed: January 24, 2001
    Publication date: July 25, 2002
    Inventor: Jiwen F. Duan
  • Temporarily crosslinked polyester polymers
    Patent number: 6407194
    Abstract: A process for increasing the pill resistance of a polyester polymer wherein the polyester polymer is produced by polymerizing a polymerization mixture comprising (a) a carbonyl compound or an oligomer of the carbonyl compound and (b) a glycol. The process comprises contacting the polymerization mixture with a cross-linker comprising (RO)mSi(X)nZp, wherein: R is hydrogen, a hydrocarbon, or a hydrocarbon oxygen; X is a hydrocarbon or a hydrocarbon oxygen; Z is a hydrophilic group; m is 1 to 3; n is 1 to 3; and p is 1 to 30.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: June 18, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Jiwen F. Duan