Granted Patent
Utility
US 6,326,447 · App. 09/312,264
Polymeric compositions for soil release on fabrics
Inventor:
John J. Fitzgerald
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: May 14, 1999
Inventor
John J. Fitzgerald
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.