Granted Patent
Utility
US 5,746,992 · App. 08/539,461
Silica aerogel produced under subcritical conditions
Inventors:
Bulent E. Yoldas, Michael O. Okoroafor
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Oct 5, 1995
Inventors
Bulent E. Yoldas
Michael O. Okoroafor
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.