Granted Patent
Utility
US 5,236,642 · App. 07/458,487
Multiple layer sheet materials, and packages, and methods and apparatus for making
Inventors:
Robert J. Blemberg, John P. Eckstein, Kevin J. Curie
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Dec 28, 1989
Inventors
Robert J. Blemberg
John P. Eckstein
Kevin J. Curie
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.