Granted Patent
Utility
US 4,879,140 · App. 07/274,380
Method for making pigment flakes
Inventors:
Howard Robert Gray, Richard P. Shimshock, Matthew E. Krisl
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Nov 21, 1988
Inventors
Howard Robert Gray
Richard P. Shimshock
Matthew E. Krisl
Assignee (at issue)
Deposition Sciences, 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.