Granted Patent
Utility
US 4,830,463 · App. 07/153,746
Article comprising silica-based glass containing aluminum and phorphorus
Inventors:
Paul J. Lemaire, John B. MacChesney, Jay R. Simpson
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Feb 8, 1988
Inventors
Paul J. Lemaire
John B. MacChesney
Jay R. Simpson
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.