Granted Patent
Utility
US 4,904,572 · App. 07/182,966
Thermographic recording materials and coating composition therefor
Inventors:
Edward J. Dombrowski, Patrick F. King
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Apr 18, 1988
Inventors
Edward J. Dombrowski
Patrick F. King
Assignee (at issue)
Polaroid 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.