Granted Patent
Utility
US 5,653,790 · App. 08/603,046
Zinc phosphate tungsten-containing coating compositions using accelerators
Inventors:
Nicephoros A. Fotinos, Donald Robb Vonk, Ralph C. Gray
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Feb 16, 1996
Inventors
Nicephoros A. Fotinos
Donald Robb Vonk
Ralph C. Gray
Assignee (at issue)
PPG Industries, Inc.
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.