Granted Patent
Utility
US 5,547,752 · App. 07/713,936
Blend of polybutylene and ionomer forming easy-open heatseal
Inventor:
Apostol Yanidis
Patented Case
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Granted: Aug 20, 1996
Filed: Jun 12, 1991
Inventor
Apostol Yanidis
Assignee (at issue)
James River Paper Company, Inc.
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.