Granted Patent
Utility
US 4,981,933 · App. 07/370,809
Azlactone copolymers
Inventors:
Robert Fazio, Lloyd D. Taylor
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jun 23, 1989
Inventors
Robert Fazio
Lloyd D. Taylor
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.