Granted Patent
Utility
US 4,881,974 · App. 07/116,949
Silver-glass paste
Inventor:
Thomas L. Herrington
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Nov 5, 1987
Inventor
Thomas L. Herrington
Assignee (at issue)
Johnson Matthey Inc.
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.