Granted Patent
Utility
US 5,266,396 · App. 08/029,270
Expanded polystyrene foam articles produced from used polystyrene materials
Inventor:
Kevin Howard
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Mar 10, 1993
Inventor
Kevin Howard
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.