Granted Patent
Utility
US 5,228,701 · App. 07/590,582
Flexible graphite articles with an amorphous carbon phase at the surface
Inventors:
Ronald Greinke, Ronald A. Howard
Patented Case
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Granted: Jul 20, 1993
Filed: Sep 28, 1990
Inventors
Ronald Greinke
Ronald A. Howard
Assignee (at issue)
UCAR Carbon Technology 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.