Granted Patent
Utility
US 6,015,907 · App. 08/979,375
Trisubstituted pyridine dyes
Inventor:
John Marshall
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Nov 26, 1997
Inventor
John Marshall
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.