Granted Patent
Utility
US 5,916,686 · App. 07/546,069
Siloxane organic hybrid polymer catalyst
Inventor:
Chia-Cheng Lin
Patented Case
View Patent ↗
Granted: Jun 29, 1999
Filed: Jun 29, 1990
Inventor
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.