Granted Patent
Utility
US 6,130,261 · App. 08/859,202
Method of recycling polyester foam
Inventor:
Walter R. Harfmann
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: May 20, 1997
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.