Granted Patent
Utility
US 5,198,152 · App. 07/647,530
Preceramic compositions and ceramic products with an unsaturated organic or organosilicon compound
Inventors:
Eric W. Liimatta, Yuan-Fu Yu
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Jan 15, 1991
Inventors
Eric W. Liimatta
Yuan-Fu Yu
Assignee (at issue)
Ethyl Corporation
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.