Granted Patent
Utility
US 5,130,217 · App. 07/761,116
Squarylium photoconductors with noncrystalline bisphenol a binders
Inventors:
Robert B. Champ, Donald A. Stremel
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: Sep 17, 1991
Inventors
Robert B. Champ
Donald A. Stremel
Assignee (at issue)
Lexmark International, 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.