Granted Patent
Utility
US 6,180,248 · App. 07/799,805
Siloxane organic hybrid polymers
Inventors:
John D. Basil, Chia-Cheng Lin, Robert M. Hunia, Helmut Franz
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Nov 29, 1991
Inventors
John D. Basil
Chia-Cheng Lin
Robert M. Hunia
Helmut Franz
Assignee (at issue)
PPG Industries Ohio, 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.