Granted Patent
Utility
US 4,789,507 · App. 06/791,877
Production of preceramic and ceramic fibers from friable, thermally sensitive organosilicon preceramic polymers
Inventors:
John L. Wesley, Henry H. George, Jr.
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Oct 28, 1985
Inventors
John L. Wesley
Henry H. George, Jr.
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.