Granted Patent
Utility
US 5,071,686 · App. 06/802,908
Films of polypropylene blends and polyethylene blends and articles made therewith
Inventors:
Roger P. Genske, Yong Joo Kim, Russell P. Gehrke, Richard E. Johnson, R. Daniel Webster, Leonard F. Czuba
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Nov 29, 1985
Inventors
Roger P. Genske
Yong Joo Kim
Russell P. Gehrke
Richard E. Johnson
R. Daniel Webster
Leonard F. Czuba
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.