Granted Patent
Utility
US 4,236,934 · App. 06/016,707
Nonleafing aluminum flake pigments
Inventor:
Harry E. Bell
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Feb 28, 1979
Inventor
Harry E. Bell
Assignee (at issue)
Alcan Aluminum 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.