Granted Patent
Utility
US 5,627,014 · App. 08/460,229
Benzpyrylium squarylium and croconylium dyes, and processes for their preparation and use
Inventors:
Peter K. Chu, Serajul Haque, Anthony J. Puttick, Socorro M. Ramos, Robert P. Short, Stephen G. Stroud, Stephen J. Telfer, Michael J. Zuraw
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Jun 2, 1995
Inventors
Peter K. Chu
Serajul Haque
Anthony J. Puttick
Socorro M. Ramos
Robert P. Short
Stephen G. Stroud
Stephen J. Telfer
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.