Granted Patent
Utility
US 6,663,806 · App. 09/795,520
Processes for making poly (trimethylene terephthalate) yarns
Inventors:
James M. Howell, Joe Forrest London, Jr., Michelle Watkins
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Feb 28, 2001
Inventors
James M. Howell
Joe Forrest London, Jr.
Michelle Watkins
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.