Granted Patent
Utility
US 6,426,398 · App. 09/793,832
Poly (trimethylene terephthalate) polymer composition
Inventors:
Joseph V. Kurian, Yuanfeng Liang, Donald Edward Putzig
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Feb 27, 2001
Inventors
Joseph V. Kurian
Yuanfeng Liang
Donald Edward Putzig
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.