Granted Patent
Utility
US 5,270,268 · App. 07/949,154
Aluminum borate devitrification inhibitor in low dielectric borosilicate glass
Inventors:
Jau-Ho Jean, Tapan K. Gupta
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Sep 23, 1992
Inventors
Jau-Ho Jean
Tapan K. Gupta
Assignee (at issue)
Aluminum Company of America
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.