Granted Patent
Utility
US 6,044,663 · App. 09/047,865
Impregnated vitreous (glassy) carbon graphite liner and heating element for a fiber optic draw furnace
Inventors:
Daniel D. Uhm, Robert A. Spencer
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Mar 25, 1998
Inventors
Daniel D. Uhm
Robert A. Spencer
Assignee (at issue)
ALCATEL
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.