Granted Patent
Utility
US 5,599,753 · App. 08/521,325
Borosilicate glass weak in boric acid
Inventors:
Eckhart Watzke, Andrea Kampfer, Thomas Kloss, Gerhard Kemmler
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Aug 30, 1995
Inventors
Eckhart Watzke
Andrea Kampfer
Thomas Kloss
Gerhard Kemmler
Assignee (at issue)
JENAer Glaswerk GmbH
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.