Granted Patent
Utility
US 4,530,945 · App. 06/641,351
Pigment grinding vehicle
Inventors:
Roger M. Christenson, Roger L. Scriven, Robert D. Jerabek, Jeffrey G. Koren, Mark W. Johnson
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Aug 15, 1984
Inventors
Roger M. Christenson
Roger L. Scriven
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.