Granted Patent
Utility
US 5,153,090 · App. 07/546,044
Charge directors for use in electrophotographic compositions and processes
Inventor:
Ronald Swidler
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jun 28, 1990
Inventor
Ronald Swidler
Assignee (at issue)
Commtech International Management 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.