Granted Patent
Utility
US 5,405,976 · App. 08/126,427
Benzpyrylium squarylium and croconylium dyes, and processes for their preparation and use
Inventors:
Stephen J. Telfer, Robert P. Short, Stephen G. Stroud, Anthony J. Puttick, Socorro M. Ramos, Michael J. Zuraw
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Sep 24, 1993
Inventors
Stephen J. Telfer
Robert P. Short
Stephen G. Stroud
Anthony J. Puttick
Socorro M. Ramos
Michael J. Zuraw
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.