Granted Patent
Utility
US 6,720,403 · App. 10/286,723
Polyurethaneurea and spandex comprising same
Inventor:
Nathan E. Houser
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Nov 1, 2002
Inventor
Nathan E. Houser
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.