Granted Patent
Utility
US 4,436,804 · App. 06/359,335
Light-sensitive polymeric diazonium condensates and reproduction compositions and materials therewith
Inventor:
John E. Walls
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Mar 18, 1982
Inventor
John E. Walls
Assignee (at issue)
American Hoechst 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.