Granted Patent
Utility
US 4,483,701 · App. 06/496,222
Cooling vacuum holder by suction fluid flow
Inventors:
John D. Kellar, Gordon F. Pereman
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: May 24, 1983
Inventors
John D. Kellar
Gordon F. Pereman
Assignee (at issue)
PPG Industries, 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.