Granted Patent
Utility
US 4,513,683 · App. 06/481,850
Coating uniformity improvement apparatus
Inventor:
Semyon Kisler
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Apr 4, 1983
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.