Granted Patent
Utility
US 4,836,233 · App. 07/203,009
Method and apparatus for venting vacuum processing equipment
Inventor:
Robert W. Milgate, III
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Jun 6, 1988
Inventor
Robert W. Milgate, III
Assignee (at issue)
Eclipse Ion Technology, 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.