Granted Patent
Utility
US 4,546,159 · App. 06/248,680
Eliminating polymers useful in diffusion control layers
Inventor:
Lloyd D. Taylor
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Mar 30, 1981
Inventor
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.