Granted Patent
Utility
US 5,141,801 · App. 07/431,606
Coextruded polyolefin films having improved barrier properties
Inventors:
Kenneth Takeshita, Attila Matray
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Nov 3, 1989
Inventors
Kenneth Takeshita
Attila Matray
Assignee (at issue)
James River II, 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.