Granted Patent
Utility
US 5,510,871 · App. 08/239,888
Filter for a photothermographic developer
Inventors:
Robert M. Biegler, Rosanne E. Gronseth, Robert J. Ryther, Michael P. Juaire, John Arild Svendsen, Youngtzung Shih
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: May 9, 1994
Inventors
Robert M. Biegler
Rosanne E. Gronseth
Robert J. Ryther
Michael P. Juaire
John Arild Svendsen
Youngtzung Shih
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.