Granted Patent
Utility
US 5,198,488 · App. 07/261,612
Preceramic compositions and ceramic products with silicon boride
Inventor:
Leonard M. Niebylski
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Oct 24, 1988
Inventor
Leonard M. Niebylski
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.