Granted Patent
Utility
US 5,637,449 · App. 08/530,066
Hydrogen atom donor compounds as contrast enhancers for black-and-white photothermographic and thermographic elements
Inventors:
Lori S. Harring, Sharon M. Simpson, Francis H. Sansbury
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Sep 19, 1995
Inventors
Lori S. Harring
Sharon M. Simpson
Francis H. Sansbury
Assignee (at issue)
Imation Corp.
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.