Granted Patent
Utility
US 4,540,725 · App. 06/641,350
Pigment grinding vehicle
Inventors:
Robert D. Jerabek, Jeffrey G. Koren, Mark W. Johnson
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Aug 15, 1984
Inventors
Robert D. Jerabek
Jeffrey G. Koren
Mark W. Johnson
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.