Granted Patent
Utility
US 5,578,424 · App. 08/376,037
Process for generation of unbuffered super-acid and for imaging
Inventors:
Jurgen M. Grasshoff, John Marshall, Richard A. Minns, Anthony J. Puttick, Lloyd D. Taylor, Stephen J. Telfer
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Jan 20, 1995
Inventors
Jurgen M. Grasshoff
John Marshall
Richard A. Minns
Anthony J. Puttick
Lloyd D. Taylor
Stephen J. Telfer
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.