Granted Patent
Utility
US 4,851,372 · App. 06/933,254
Glass-ceramic with specific thermal expansion behavior
Inventors:
Otto Lindig, Wolfgang Pannhorst
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Nov 19, 1986
Inventors
Otto Lindig
Wolfgang Pannhorst
Assignee (at issue)
Schott Glaswerke
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.