Granted Patent
Utility
US 4,547,247 · App. 06/588,031
Plasma reactor chuck assembly
Inventors:
Douglas H. Warenback, Thomas M. Rathmann, Ninko T. Mirkovich
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Mar 9, 1984
Inventors
Douglas H. Warenback
Thomas M. Rathmann
Ninko T. Mirkovich
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.