Granted Patent
Utility
US 4,613,306 · App. 06/729,675
Evaporator crucible for vacuum depositing systems
Inventors:
Volker Bauer, Albert Feuerstein, Horst Ranke
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: May 2, 1985
Inventors
Volker Bauer
Albert Feuerstein
Horst Ranke
Assignee (at issue)
Leybold-Heraeus 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.