Granted Patent
Utility
US 5,338,644 · App. 07/996,120
Process and composition for use in photographic materials containing hydroquihones
Inventors:
Lloyd D. Taylor, John C. Warner
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Dec 23, 1992
Inventors
Lloyd D. Taylor
John C. Warner
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.