Granted Patent
Utility
US 4,457,256 · App. 06/222,331
Precharged web coating apparatus
Inventors:
Semyon Kisler, Edwin A. Chirokas, Donald A. Foster
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jan 5, 1981
Inventors
Semyon Kisler
Edwin A. Chirokas
Donald A. Foster
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.