Granted Patent
Utility
US 6,284,425 · App. 09/473,114
Thermal transfer donor element having a heat management underlayer
Inventors:
John S. Staral, Thomas R. Hoffend
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Dec 28, 1999
Inventors
John S. Staral
Thomas R. Hoffend
Assignee (at issue)
3M INNOVATIVE PROPERTIES 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.