Granted Patent
Utility
US 4,490,451 · App. 06/501,933
Multilayer electrophotographic recording material comprises a selenium-tellurium first layer and selenium-arsenic containing second layer
Inventors:
Armin Baumgaertner, Kurt Elsaesser
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jun 7, 1983
Inventors
Armin Baumgaertner
Kurt Elsaesser
Assignee (at issue)
International Standard Electric 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.