Granted Patent
Utility
US 4,588,672 · App. 06/763,817
Photographic system with quaternary releaser
Inventor:
John M. Dolphin
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Aug 8, 1985
Inventor
John M. Dolphin
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.