Granted Patent
Utility
US 4,440,558 · App. 06/387,983
Fabrication of optical preforms by axial chemical vapor deposition
Inventors:
Dilip K. Nath, Pablo C. Pureza, Shin M. Oh
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Jun 14, 1982
Inventors
Dilip K. Nath
Pablo C. Pureza
Shin M. Oh
Assignee (at issue)
International Telephone and Telegraph 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.