Granted Patent
Utility
US 4,552,714 · App. 06/417,674
Process for producing coextruded film of polypropylene, polypropylene blend, and nylon
Inventors:
Duane A. Krueger, Thomas Walter Odorzynski
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Sep 13, 1982
Inventors
Duane A. Krueger
Thomas Walter Odorzynski
Assignee (at issue)
American 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.