Granted Patent
Utility
US 5,152,838 · App. 07/297,848
Coating fluid drying apparatus
Inventor:
Semyon Kisler
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jan 17, 1989
Inventor
Semyon Kisler
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.