Granted Patent
Utility
US 5,281,302 · App. 08/004,528
Method for cleaning reaction chambers by plasma etching
Inventors:
Zvonimir Gabric, Alexander Gschwandtner, Oswald Spindler
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Jan 14, 1993
Inventors
Zvonimir Gabric
Alexander Gschwandtner
Oswald Spindler
Assignee (at issue)
Siemens Aktiengesellschaft
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.