Granted Patent
Utility
US 5,458,724 · App. 07/320,494
Etch chamber with gas dispersing membrane
Inventors:
Daniel J. Syverson, Richard Novak, Eugene L. Haak
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Mar 8, 1989
Inventors
Daniel J. Syverson
Richard Novak
Eugene L. Haak
Assignee (at issue)
FSI INTERNATIONAL, INC.
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.