Granted Patent
Utility
US 6,428,297 · App. 09/418,165
Apparatus for making a corrugation-free foam
Inventors:
Wayne J. Myer, Blaine M. Kelley
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Oct 13, 1999
Inventors
Wayne J. Myer
Blaine M. Kelley
Assignee (at issue)
Dart Container Corporation
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.