Granted Patent
Utility
US 4,632,624 · App. 06/588,027
Vacuum load lock apparatus
Inventors:
Ninko T. Mirkovich, John Zajac
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Mar 9, 1984
Inventors
Ninko T. Mirkovich
John Zajac
Assignee (at issue)
TEGAL CORPORATION
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.