Granted Patent
Utility
US 4,632,893 · App. 06/815,327
Electrophotographic recording material containing selected dithioke topyrrolopyrroles
Inventors:
Alain C. Rochat, Abul Iqbal, Remy Jeanneret, Jin Mizuguchi
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Dec 31, 1985
Inventors
Alain C. Rochat
Abul Iqbal
Remy Jeanneret
Jin Mizuguchi
Assignee (at issue)
Ciba-Geigy
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.