Granted Patent
Utility
US 5,536,622 · App. 08/520,291
Hydrazide compounds useful as co-developers for black-and-white photothermographic elements
Inventors:
Sharon M. Simpson, Lori S. Harring
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Aug 28, 1995
Inventors
Sharon M. Simpson
Lori S. Harring
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.