Granted Patent
Utility
US 4,764,404 · App. 06/802,910
Films having a polypropylene blend layer
Inventors:
Roger P. Genske, Yong Joo Kim
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Nov 29, 1985
Inventors
Roger P. Genske
Yong Joo Kim
Assignee (at issue)
American National Can Company
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.