Granted Patent
Utility
US 5,919,527 · App. 08/974,798
Waterbourne fluoropolymer solutions for treating hard surfaces
Inventors:
John J. Fitzgerald, Thomas C. Felder
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: Nov 20, 1997
Inventors
John J. Fitzgerald
Thomas C. Felder
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.