Granted Patent
Utility
US 5,266,263 · App. 07/967,665
Reprocessing of used evaporation boats
Inventors:
Klaus Hunold, Peter Matje
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Oct 28, 1992
Inventors
Klaus Hunold
Peter Matje
Assignee (at issue)
Elektroschmelzwerk Kempten 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.