Granted Patent
Utility
US 4,150,987 · App. 05/842,431
Hydrazone containing charge transport element and photoconductive process of using same
Inventors:
Howard W. Anderson, Michael Thomas Moore
Patented Case
View Patent ↗
Granted: Apr 24, 1979
Filed: Oct 17, 1977
Inventors
Howard W. Anderson
Michael Thomas Moore
Assignee (at issue)
International Business Machines 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.