Granted Patent
Utility
US 5,985,190 · App. 09/067,727
Method and system for forming low-density polymer foam article
Inventor:
Walter R. Harfmann
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Apr 28, 1998
Inventor
Walter R. Harfmann
Assignee (at issue)
Genpak, LLC
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.