Granted Patent
Utility
US 5,258,224 · App. 07/597,063
Preceramic composition and ceramic product
Inventors:
Conrad J. Langlois, Jr., Genevieve S. Lum
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: Oct 15, 1990
Inventors
Conrad J. Langlois, Jr.
Genevieve S. Lum
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.