Granted Patent
Utility
US 6,790,905 · App. 09/973,101
Highly repellent carpet protectants
Inventors:
Patrick H. Fitzgerald, Andrew Hen Liu, Peter Michael Murphy, Charles Strickler
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Oct 9, 2001
Inventors
Patrick H. Fitzgerald
Andrew Hen Liu
Peter Michael Murphy
Charles Strickler
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.