Granted Patent
Utility
US 5,272,039 · App. 07/877,921
Preparation of magnetic carrier particles
Inventor:
William E. Yoerger
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: May 4, 1992
Inventor
William E. Yoerger
Assignee (at issue)
EASTMAN KODAK COMPANY
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.