Granted Patent
Utility
US 4,814,017 · App. 06/915,346
Aqueous organoalkoxysilane/metal oxide sol-gel compositions
Inventors:
Bulent E. Yoldas, Chia-Cheng Lin
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Oct 3, 1986
Inventors
Bulent E. Yoldas
Chia-Cheng Lin
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.