Granted Patent
Utility
US 4,754,012 · App. 06/914,860
Multi-component sol-gel protective coating composition
Inventors:
Bulent E. Yoldas, Chia-Cheng Lin
Patented Case
View Patent ↗
Granted: Jun 28, 1988
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.