Granted Patent
Utility
US 5,725,950 · App. 06/909,369
Coating of preceramic articles with silicon and/or carbon during pyrolysis to ceramic
Inventors:
Paul Foley, Linda C. Sawyer
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Sep 19, 1986
Inventors
Paul Foley
Linda C. Sawyer
Assignee (at issue)
Hoechst Celanese 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.