Granted Patent
Utility
US 5,340,776 · App. 07/881,929
Preparation of very fine glass powder of high purity
Inventors:
Hartmut Paschke, Johann Daimer, Richard Haring
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: May 12, 1992
Inventors
Hartmut Paschke
Johann Daimer
Richard Haring
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.