Granted Patent
Utility
US 4,771,962 · App. 07/083,908
Apparatus and process for forming center unwindable rolls of perforated plastic film
Inventors:
James R. Gavin, James F. Roeland
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Aug 6, 1987
Inventors
James R. Gavin
James F. Roeland
Assignee (at issue)
Mobil Oil 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.