Granted Patent
Utility
US 5,647,903 · App. 08/538,486
Microporous high structure precipitated silicas and methods
Inventors:
Patrick D. McGill, William C. Fultz
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Oct 3, 1995
Inventors
Patrick D. McGill
William C. Fultz
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.